Early career While playing high school hockey, Maroon caught the attention of
Kelly Chase and
Al MacInnis who had recently purchased a
North American Hockey League (NAHL) team, the
Texarkana Bandits. After meeting with his parents, Maroon joined their team for one season and recorded 60 points in 57 games. He was subsequently named to the NAHL's All-Rookie Team. As the team was in its early stages, Maroon and other rookies would build the rink, paint the ice, and put up boards, as well as cover the ice if the rodeo was in town. In spite of his success, he still went undrafted in the
2006 NHL entry draft and Chase and MacInnis encouraged him to work out every day. This resulted in him losing 30 pounds over the summer and increasing his offensive output to 95 points in 57 games during the 2006–07 season. Following the draft, Maroon was assigned to
major junior ice hockey team, the London Knights of the OHL, who had drafted him in the 2004 OHL Selection Draft. Maroon had been invited to the Flyers' rookie and main training camps but was reassigned to the Knights after one exhibition game with their
American Hockey League (AHL) affiliate. Although he had previously agreed to play NCAA ice hockey with
Ferris State University, Mark and
Dale Hunter convinced him to play in the OHL. and earned team MVP. He ended the season leading the team with 90 points in 64 games and one assist in five playoff games before joining the Flyers' AHL affiliate the
Philadelphia Phantoms. He played one game with the Phantoms as they closed out their 2007–08 season. Maroon began his first full professional season during the
2008–09 AHL season with the Phantoms after being assigned to the AHL following the Flyers' training camp. He ranked fourth on the team with 54 points in 80 games and recorded a team-high three points in four playoff games. During the summer of 2010, Maroon led the
United States men's national inline hockey team to a gold medal performance at the
2010 IIHF InLine Hockey World Championship. He had been allowed on the team without trying out due to his infamous play at the AHL level. He scored 7 goals and 14 points in 6 games at the in-line worlds including a goal and an assist in the gold medal game in Karlstad, Sweden, against the Czech Republic. When he returned to the AHL, the coaching staff was unhappy with his conditioning and released him from the team.
Professional (2011–present) Anaheim Ducks (2011–2016) Shortly after the trade, Maroon was assigned to Anaheim's AHL affiliate, the
Syracuse Crunch. Upon his arrival in Syracuse, coach Mark Holick told him, "I traded my best player for you. I don't know what you did in Philly, but I hope you can play." As a result of his successful season, he was invited to the Ducks' training camp prior to the
2011–12 season but was sent on waivers back to the Crunch. After scoring three points in the Crunch's home opener against his former team, the Ducks recalled him to the NHL level for his debut. He made his debut on October 25 against the
Chicago Blackhawks, playing 15:19 minutes of ice time. He played two more games for the team alongside
Corey Perry and
Ryan Getzlaf before being returned to the AHL. and recorded a hat trick in a 6–3 win over the
Norfolk Admirals. He was subsequently signed to a contract extension with the Ducks through the 2012–13 season. The
2013–14 season was Maroon's first full NHL season, during which he appeared in 62 games, scoring 11 goals to go with 18 assists. Although he had a year left on his contract, the Ducks signed him to a three-year contract extension on August 2, 2014. In the final year of his second contract, Maroon appeared in 71 games, only missing a few due to injury. He missed four weeks at the beginning of the season due to a sprained MCL which he suffered during a game against the
Buffalo Sabres. Upon returning to the lineup, Maroon would appear in 71 games, scoring a career high 9 goals with 25 assists. His offensive game came alive in the
2015 Stanley Cup playoffs, scoring eight goals in 16 games while playing on the Ducks' top line. Maroon was one of the Ducks' most consistent players during their series, finishing third on the team in goals and power play points as well as limited his penalty minutes. In the
2015–16 season, Maroon found himself playing with the fourth line for the Ducks at the beginning of the season. At times his play was exemplary and other times he often saw his ice time drop to below ten minutes a game. He was reunited with Corey Perry and found his scoring touch, picking up consecutive points in consecutive games, while scoring just 4 goals and 13 points in 56 games. In spite of his low offensive output, he traveled with Perry and his wife to Pelican Hill Resort on
trade deadline day where he was then informed by his mother that he had been traded to Edmonton. He made his Oilers debut on March 3 against the Philadelphia Flyers, where he scored his fifth goal of the season during the second period to bring their lead to three. After scoring against his old organization, Maroon said "it all hit me...it brought me back to my time in Philly, when I didn't know how to train, I was out of shape, my dark days. And then now, like, holy f---, this is really happening." As the Oilers failed to qualify for the
2016 Stanley Cup playoffs, Maroon, Oilers GM
Peter Chiarelli and head coach
Todd McLellan discussed their expectations of Maroon for his offseason conditioning. On April 11, 2016, Maroon was named to Team USA's
2016 IIHF World Championship roster alongside teammate
Matt Hendricks. He became the first United States player to represent his country at both an inline and ice hockey world championship. In his debut game with the
United States men's national ice hockey team, Maroon scored their first and only goal in an eventual 5–1 loss to Canada. His goal came less than five minutes into the first period off an assist from
Kyle Connor. He would end the tournament collecting two more points as Team USA failed to medal. When Maroon returned to the Oilers for their 2016 training camp, McLellan was pleased with Maroon's offseason condition. During a preseason game against the Vancouver Canucks, Maroon was checked hard into a corner and was forced to leave the game early. In spite of this, he returned to the Oilers lineup for their preseason game against the Anaheim Ducks on October 5 where he recorded one assist and his first goal of the preseason. Following the exhibition games, the Oilers opened their
2016–17 season playing in their new arena,
Rogers Place. In the Oilers first home game on October 12, Maroon scored the first goal in the Rogers Place arena in a 7–4 victory over the
Calgary Flames. Maroon continued to play the remainder of the 2016–17 season with the Oilers alongside Connor McDavid where they recorded a combined
Corsi percentage above 50 percent. During the offseason, the Oilers had signed
Milan Lucic to play with McDavid but Maroon was deemed to be a better fit. On January 5, 2017, Maroon scored his first career NHL hat-trick in a 4–3 win over the
Boston Bruins, breaking the Oilers losing record against Boston which began in November 1996. He ended the season with a new career high 27 total goals and 15 assists, the best for any NHL player born and raised in St. Louis. McDavid, who ended the season with 100 points, assisted on 14 of Maroon's 27 goals. In March, Maroon was named the Oilers nominee for the
Bill Masterton Memorial Trophy, given to a player who "best exemplifies the qualities of perseverance, sportsmanship, and dedication to ice hockey." With his assistance, the Oilers qualified for the
2017 Stanley Cup playoffs where they faced off against the
San Jose Sharks in Round 1. He scored his first goal of the playoffs in Game 5 to lift the Oilers 4–3 over the Sharks and lead the series 3–2. Upon winning their first series against the Sharks, Maroon and the Oilers began the
Western Conference Second Round against the Anaheim Ducks. In Game 2 of the series, Maroon scored his first career goal against his former team to lift the Oilers in a 2–1 win. The Ducks would come back to win the series in seven games and Maroon recorded eight points in 13 games. On January 3, 2018, Maroon was suspended for two games for interfering against
Los Angeles Kings defenseman
Drew Doughty. Following the game, Doughty publicly stated that he felt no ill will towards Maroon and acknowledged that "he’s just trying to finish a hit. I don’t know that he meant to try and hurt me. I forgive him." He later missed another game against the Los Angeles Kings in February due to a lower body injury. At the time of his injury, he had recorded 14 goals and 16 assists in 57 games. Maroon acknowledged that as an upcoming unrestricted free-agent in July, there was a high likelihood of him being traded before the season ended. He said, "you know the situation I’m in...but I’m an Edmonton Oiler, I want to stay here. I love this city, the fans, this group of guys. I think my teammates know that."
New Jersey Devils (2018) On February 25, 2018, Maroon was traded to the
New Jersey Devils in exchange for J. D. Dudek and a third-round pick in the
2019 NHL entry draft. He was displeased with the trade and said "I didn't really want to get traded out of Edmonton...I actually loved it there. I actually liked it. The fans are great. I liked it. You know what the most important thing was? The guys were great. Unbelievable guys. You could not have found a better group of guys. But obviously I got traded for a reason. We weren't winning." He made an immediate impact on the team, recording eight points in his first 12 games and earned praise from his teammates on his playmaking ability. Center
Travis Zajac spoke highly of Maroon saying, "we're a high-skill, fast team, but you add a player like Patty who can grind away and protect the puck, and bring pucks to the net, go to the net, it adds another threat for us, and it's been a good addition." He ended the season with 13 points in 16 games as he underwent surgery during the offseason to repair a herniated disc in his back.
St. Louis Blues (2018–2019) during the
St. Louis Blues' championship parade following the
2019 Stanley Cup Finals Due to his success with the Devils and Oilers, Maroon expected to be selected quickly as a free agent. Yet, after a week passed and he had only met with the St. Louis Blues, Maroon switched agents. His newest agent tried to bring him another deal with New Jersey but Maroon chose to return home and be closer to his son. In 74 regular season games, Maroon scored 10 goals to go with 18 assists for 28 points. As the Blues geared up to face the Winnipeg Jets in the first round of the playoffs, Maroon's grandfather died. Maroon returned to play with the team for Game 1 and later said he felt his grandfather's presence while assisting on the game-winning goal. He helped the team eliminate the Jets in six games and faced off against the
Dallas Stars in the second round. Their series was tied 3–3 and they entered Game 7 facing elimination. During the game, Maroon scored the game-winning goal in double overtime to give the Blues a 4–3 series win. Following the win, the Blues defeated the
San Jose Sharks in the
Western Conference Final to face the Bruins in the
Stanley Cup Finals. On June 12, Maroon and the Blues won the Stanley Cup for the first time in franchise history, defeating the Bruins in seven games. He finished the playoffs with seven points. On August 24, 2019, Maroon signed a one-year, $900,000 contract with the Lightning and changed his jersey number to 14. He played the entirety of the
2019–20 season, which was cut short due to the
COVID-19 pandemic. During the pause in play, Maroon used inline skating to remain in shape. He was named to the Lightning's return to play roster for the Stanley Cup Qualifiers on July 26, 2020. On September 28, 2020, after the Lightning won the Stanley Cup, Maroon became the third player in the post-expansion era to win consecutive Stanley Cups with different teams, following
Claude Lemieux and
Cory Stillman. Following the Lightnings' Stanley Cup win, Maroon signed a two-year, $1.8 million contract to remain with the Lightning on October 29, 2020. On July 7, 2021, the Tampa Bay Lightning won their franchise's third Stanley Cup, and Maroon won his third straight Stanley Cup. He subsequently is the first player to go three-for-three in different uniforms since the expansion era began in 1967 and expanded the league beyond six teams. By February 2022, Maroon was re-signed to a two-year contract extension. He would go on to end the
2021–22 season with 11 goals and 16 assists for 27 points in 81 games played. During the
2022 playoffs, Maroon and the Lightning would go on to reach the
Stanley Cup Finals for a third consecutive season (fourth consecutive season and time altogether for Maroon himself), where the Lightning would lose in six games to the
Colorado Avalanche. Maroon would record five goals and nine assists for 14 points in 80 games in the
2022–23 season, while also leading the league in penalty minutes (150). Playing the
Toronto Maple Leafs in the first round of the playoffs for a second consecutive year, Maroon and the Lightning would go on to lose the series in six games. He finished the
2023 playoffs goalless and with only one assist and point in all six games played.
Minnesota Wild (2023–2024) On July 2, 2023, Maroon's four-year tenure with the Tampa Bay Lightning concluded when he was traded due to salary cap considerations, along with
Maxim Čajkovič, to the Minnesota Wild in exchange for a seventh-round pick in
2024. Maroon suffered an injury on January 27, 2024 against the
Anaheim Ducks, and was placed on
injured reserve a few days later on February 5. Just a couple days later, on February 7, 2024, the Wild announced that Maroon had undergone back surgery and would miss 4-6 weeks. At the time, Maroon had played in all of the Wild's games before his injury, registering four goals and 12 assists.
Boston Bruins (2024) On March 8, 2024, Maroon was traded to the
Boston Bruins for Luke Toporowski and a conditional 2026 sixth-round pick. Still recovering from his back surgery, the Bruins placed Maroon on long term injured reserve (LTIR) just after being acquired. On April 13, 2024, Maroon was activated off the LTIR, and made his Bruins debut later that day against the
Pittsburgh Penguins. Maroon would score his first point as a Bruin in Game 1 of the opening round against the
Toronto Maple Leafs, an assist on a goal by
John Beecher.
Chicago Blackhawks and retirement (2024–2025) As a free agent from the Bruins, Maroon moved to his eighth and final NHL outfit after securing a one-year, $1.3 million contract with the Chicago Blackhawks on July 1, 2024. On March 22, 2025, Maroon announced in a pregame television interview before a game in his hometown St. Louis that he would be retiring at the end of the season. Maroon subsequently played his final NHL game in the Blackhawks' last home game of the season on April 13, forgoing the Blackhawks' two remaining road games. Maroon, alongside fellow retiree
Alec Martinez, received a video tribute and standing ovation during the game, as well as a handshake line from the visiting
Winnipeg Jets. ==Post-Playing career==