As a career backup in college, Maas drew little interest from the professional ranks. On April 23, 1999, Maas signed with the
National Football League's
Baltimore Ravens during preseason. He appeared in a single preseason game and did not impress the coaching staff enough to win a roster spot.
Joining the CFL For the
2000 CFL season Maas signed with the Edmonton Eskimos, where the coaching staff intended to use him as a backup and (with
Dan Crowley) the holder on field goal and extra point attempts. The Eskimos were, at the time, one of the league's deepest teams at the quarterback position, with Maas, Crowley, and incumbent starter
Nealon Greene all eventually assuming starting jobs somewhere in the CFL during their careers. Maas dressed for all eighteen games but saw significant action in only one, going 16 of 25 for 165 yards, a touchdown, and an interception. The Eskimos were eliminated in the Western finals by the
B.C. Lions. During the preseason of
2001, Eskimos head coach
Don Matthews was fired in a famously messy separation, allegedly for health reasons, and was replaced by
Tom Higgins. Higgins later developed a reputation for changing quarterbacks frequently, and although Greene had been the starter in Edmonton for two years, his spotty arm was beginning to draw criticism from fans. The door was wide open for the two backups, Crowley and Maas, to show that they could take the reins from the faltering Greene. Crowley was strong and Greene fought valiantly to keep his job, but by Week 7, Maas took the starting quarterback spot that he kept to the end of the year. Maas picked the league apart in his first year as a starter, and despite his late start was a West Division All-Star and the Edmonton nominee for CFL Outstanding Player. He completed 231 of 391 pass attempts for 3,646 yards, recording 21 touchdowns and 12 interceptions. His performance in the 2001
Labour Day Classic, when Maas was the offensive star and recorded a late 23-yard run to set up the winning field goal as time expired, made him a fan favourite. Maas led the Eskimos to first place in one of the weakest Western Divisions of all time, as the Eskimos won the division by winning only as many as they lost. The end of the year was sour as the Eskimos were blown out by the rival
Calgary Stampeders in the Western Final, 34–18. Maas emerged with little credit in the defeat, and after two straight years of disappointment, the local media were beginning to speculate whether the Eskimos were
ever going to get past the Western Final.
Professional setbacks Maas emerged from the 2001 season secure as the incumbent starter. Potential rivals Crowley and Greene were gone for
2002, Crowley to the newly minted
Ottawa Renegades in the expansion draft, where he became their starting quarterback, and Greene to the
Saskatchewan Roughriders in a trade. The two backups were
Bart Hendricks and an unknown named
Ricky Ray, neither of whom was expected to challenge Maas for the starting job. Maas was named Offensive Player of the Week in Week 2 and was on pace for another All-Star season. However, in Week 4 against
Nealon Greene's Roughriders, Maas suffered a
separated shoulder in his non-throwing arm and the injury was serious enough to sideline Maas for several games. The nominal number two was Hendricks, but he was unavailable, and the third-stringer Ray temporarily took over the starting role for the Eskimos. Ray seized his chance, and in his first CFL start threw for four touchdowns against the B.C. Lions. As fans watched with delight, Ray piled up remarkable numbers during Maas's recovery, leading to an inevitable showdown when the former starter returned. After missing three weeks, Maas returned against the
Winnipeg Blue Bombers and was utterly forgettable. One mediocre game was all Higgins needed to see and Maas was immediately sent to the bench in favour of Ray, who started the next five games. However, reminiscent of Maas's junior season in Oregon with Akili Smith, Higgins seemed unable to make up his mind. In a game against the
Hamilton Tiger-Cats, Ray struggled, and Maas came in, successfully engineering an Eskimos comeback. Ray started the next game but in the game after, the second-to-last game of the season, Maas again appeared in relief and was again solid. Finally, in the last game of the year, Maas got the start and played well. In his first season, Ray had recorded almost 3,000 passing yards and a quarterback rating over 100, helping the Eskimos win the West Division for the third consecutive year with the third consecutive starting quarterback. Maas had played less often but still well and had started to win back the confidence of the fans and of the team with a strong end to the season. But for the playoffs Higgins returned to Ray, who led the Eskimos to the
90th Grey Cup, which they lost to the
Montreal Alouettes, coached by Maas's first CFL head coach, Don Matthews. In
2003, Maas was looking to regain his starting job from Ray but suffered a back injury during the off-season. The condition was severe enough to require surgery and Ray became the starter out of training camp. Maas was the holder for kicker
Sean Fleming as he healed, but by Week eight he was completely healthy. However, Higgins had drawn criticism for his "quarterback by committee" in 2002 and had little desire to repeat the adventure. Maas was entrenched on the bench as Ray helped deliver the Eskimos the
91st Grey Cup in a rematch with the Alouettes.
Opportunity knocks After 2003, Ray was a hot commodity. NFL scouts were known to be looking at Ray, and during the offseason, Ray was able to stick with the
New York Jets. The loss of the star quarterback dismayed Eskimos fans, but this was tempered with calm knowing that Maas was around to fill the void in
2004. The pressure on Maas was high, but his performance was up to it. Maas threw for an incredible 5,274 yards, well higher than Ray's 2003 total of 4,640. Maas threw for "only" 31 touchdowns, four fewer than Ray's 35 in 2003, but his 105.1 quarterback rating ranked among the great seasons ever. In an ironic scene for Maas, he lost the Most Outstanding Player award to Lions quarterback
Casey Printers who took over the starting role after an injury to incumbent superstar
Dave Dickenson, similar to Ray taking over for Maas. Maas had a strong playoff performance in his single game, throwing for 369 yards in the West Semi-Final. But despite Maas' numbers the offense just was not there as the Eskimos lost a wet and miserable game to
Henry Burris and the Saskatchewan Roughriders 14–6. Maas's career playoff record fell to 0–2, and head coach Higgins was fired as a result of the loss.
Return to the bench Unfortunately for Maas's individual numbers, Ray struggled south of the border. He never threw a regular season pass with the Jets, and after being released tried in vain to catch on with another NFL team in time for the
2005 NFL season. Conjecture immediately ran high that Ray would be lured back to the Eskimos with a relatively big-money deal, which soon followed. In addition, Maas faced additional competition from recently signed former Most Outstanding Player
Khari Jones. Former offensive coordinator and new head coach
Danny Maciocia had led Maas's offense during his 2004 season, but he also knew that the starting quarterback had to be decisively selected and stuck to. After preseason, Maciocia chose and stuck to Ray, returning Maas to the bench for the
2005 CFL season. Maas saw little game action in the regular season, appearing only in relief for the final game, a blowout loss to the Calgary Stampeders. However, entering into the next week's Western Semi-final game against the Stampeders, Ricky Ray was being criticized for his recent play, and after a relatively poor first half, Maciocia put Maas in for Ray for the second half. Maas re-ignited the dormant Eskimos offense and led them to a comeback victory, resurrecting the old quarterback controversy that had plagued the Eskimos for years. Maas followed this up by again appearing in relief during the fourth quarter over Ray in the West Division final against the Lions, scoring the winning touchdown and leading the Eskimos to another victory. Once again, perhaps because of rumours Maas had already been traded to the Hamilton Tiger-Cats for veteran quarterback
Danny McManus and lineman
Tim Bakker, Maciocia opted to start Ray in the
93rd Grey Cup. Ray played the whole game and won it, being named MVP in the process. After the game, confirming what
TSN called "the CFL's worst-kept secret", Maas was traded to the Tiger-Cats.
Starting in Steeltown The Tiger-Cats had a busy off-season after the 2005 season. Along with Maas, the Tiger-Cats also acquired running back
Josh Ranek from the defunct
Ottawa Renegades, running back/return man and reigning Most Outstanding Special Teams Player
Corey Holmes from the Saskatchewan Roughriders in exchange for the first overall pick in Ottawa's
dispersal draft (Saskatchewan selected quarterback
Kerry Joseph). Significantly for Maas, the team also added his former favourite target in Edmonton, receiver
Terry Vaughn, from Montreal as a free agent. In spite of the big names added to the offense, the Tiger-Cats struggled immediately and badly. On July 10, 2006, the Tiger-Cats relieved head coach
Greg Marshall of his duties after an 0–4 start, appointing 67-year-old veteran head coach
Ron Lancaster as his replacement. The team also fired offensive coordinator
Joe Paopao, offensive line coach
Kani Kauahi, and replaced interim general manager since 2005
Rob Katz with former Montreal assistant GM
Marcel Desjardins later in the season. Before the Tiger-Cats'
Labour Day Classic game against Toronto, Hamilton was in last place in the East Division. Maas was seventh in the league in passing yardage, tied for seventh in touchdown passes, and tied for second in interceptions. Two of the players ahead of Maas in yardage and touchdowns, Dave Dickenson and Kerry Joseph, had struggled with injuries during the season, and the player tied with Maas's seven touchdowns was British Columbia backup
Buck Pierce. The Tiger-Cats would fall to 2–10 after Labour Day, with Maas getting no credit in a 40–6 pummeling by the Argonauts. For the
2007 CFL season Maas began the year as the starter for the Tiger-Cats. They had another rough start to the season at 1–8, prompting the pick-up of NFL castoff, and 2004
CFL MOP,
Casey Printers.
Traded to Montreal On September 7, 2007, in the wake of Hamilton's signing of
Casey Printers, recently cut by the
Kansas City Chiefs, Hamilton traded Maas to the
Montreal Alouettes in exchange for Canadian fullback
Jeff Piercy. Maas initially refused to report to his new club, a move which momentarily held up the formalization of the transaction. Maas served as the team's third-string quarterback behind
Marcus Brady and
Anthony Calvillo. Maas saw limited time on the field with the Alouettes and was released on December 31, 2007.
Back to Edmonton January 16, 2008, the Edmonton Eskimos announced Maas was back in the green and gold. Come training camp, Maas and Lefors battled for the second-string quarterback spot but were both named 2 and 2A by head coach Danny Maciocca. Maas saw about two quarters of playing time in the second preseason game of 2008 and impressed, completing 16 of 19 passes for 256 yards and a touchdown. Maas remained the Eskimos backup for 2009, but for 2010 seemed to have been demoted to third-stringer early in the season in favour of Jared Zabransky. Maas's new tenure was rumored to be an apprenticeship for a coaching job within the organization. However, Maas wished to continue playing if he couldn't play for the Eskimos, so he was released on February 22, 2011, to potentially land with another team. Maas officially retired from the CFL after an eleven-year career as a player on May 26, 2011. ==Coaching career==