Stevens played a few games with the Penguins in the
1987–88 NHL season, then spent the
1988–89 NHL season jumping back and forth between the
National Hockey League (NHL) and the
Muskegon Lumberjacks of the
International Hockey League (IHL). Starting with the
1989–90 NHL season, Stevens became one of the top left wingers and power forwards in the league. He had four consecutive seasons of at least 40 goals and 80 points from 1990 to 1994 and surpassed 50 goals and 100 points in 1991–92 and 1992–93. In the
1991–92 NHL season, Stevens scored 2 points more than
Wayne Gretzky (then in his 13th season), becoming only the third person in NHL history to outscore Gretzky in the regular season, though he still finished second in points to teammate
Mario Lemieux. His 123 points that year also set a record for the most points by an American-born player and a left wing in one season. The 55 goals he scored the following year tied him with
Jimmy Carson for most goals in a single NHL season by a United States-born player. That record would stand for another 29 years before being broken by
Auston Matthews on April 7, 2022. During the
Pittsburgh Penguins' back-to-back
Stanley Cup seasons of 1990–91 and 1991–92, Stevens was the only Penguin to play in every regular season and playoff game. He is also one of four NHL players to have accumulated more than 50 goals and at least 200 PIM in a season, the others are Keith Tkachuk, Brendan Shanahan and Gary Roberts. His 17 goals during the 1990–91 playoffs are tied for fourth all-time (only Jari Kurri and Reggie Leach with 19 and Joe Sakic with 18 have surpassed that mark). He scored 13 more in the 1991–92 postseason. On May 21, 1992, during game three of the
Prince of Wales Conference final against the
Boston Bruins, Stevens became the 25th player in NHL history to score three goals in a single playoff period. Scoring a
hat trick in the first period, he would add one more goal before the end of the game. The Penguins swept the Bruins then swept the
Chicago Blackhawks to win their second straight Stanley Cup. One year later, on May 14, 1993, the Penguins were playing the
New York Islanders in game seven of the
Patrick Division finals. Early in the first period, Stevens skated in and checked Islanders' defenseman
Rich Pilon, hitting Pilon's visor with so much force that he knocked himself unconscious. Stevens landed face first on the ice and, unable to soften the blow upon landing, shattered most of the bones in his face and required extensive reconstructive surgery. Doctors cut an incision below his hairline from ear-to-ear, which was later closed with over 100 stitches, peeled back his skin and reassembled the bones in Stevens' face with the use of metal plates. Stevens came back to have one more strong season for the Penguins, in 1993–94 (41 goals, 47 assists), before being traded the next year. Stevens was sent to the Boston Bruins in 1995 along with
Shawn McEachern for
Glen Murray and
Bryan Smolinski. Stevens was never given a chance to succeed in Boston except in preseason when he was paired with Adam Oates and Cam Neely. During the regular season Stevens was in Coach Steve Kasper's doghouse and usually played with 3rd or 4th liners. At one point Coach Kasper "benched" Stevens and Neely. Making the two stars sit on the bench for the entire game. The move proved it was time for Stevens to move on but it proved to be the end for Kasper as well. After being traded from the Penguins, Stevens never again reached the success that he had while in Pittsburgh. After "disappointing" in Boston with 23 points in 41 games, he was traded to the Los Angeles Kings. After a poor season, he was traded to the
New York Rangers in 1997, where he experienced several solid seasons, but failed to match the expectations levied on him from his marked success playing with Mario Lemieux and the Penguins. During the 1999–2000 season, Stevens struggled. Not only did he rarely see the ice during this season, but after a game against the
St. Louis Blues, he was caught in an
East St. Louis, Illinois motel with a prostitute and
crack cocaine. After this event, Stevens entered the NHL/
NHLPA Substance Abuse and Behavioral Health Program. After being released from the program, he played a brief stint with the
Philadelphia Flyers before being traded to the Pittsburgh Penguins for a second time in 2001. His return to Pittsburgh revitalized Stevens, where he impressed by scoring 23 points in 32 games reuniting with his former line mates Mario Lemieux and Jaromir Jagr, and adding a further six points in 17 playoff games as the Penguins reached the Eastern Conference Finals. He then re-signed with the Penguins for the 2001-02 season. However, after struggling with just one goal in 32 games, he left the team before a game in Buffalo in January, 2002 to fly back home to Pittsburgh and discuss his future with his wife. He ultimately did not return to the team, and retired from professional hockey. Stevens returned the Penguins in an off-ice role as a
talent scout from 2005 to 2012, including the
2008-09 NHL season, when the Penguins (and Stevens) won their third Stanley Cup. In 2017, he was hired again by the team, this time as a Special Assignment Scout. ==Post-NHL==