BC Lions in
2007 Pierce signed a free agent contract with the
BC Lions of the
Canadian Football League on May 16,
2005 after being passed over by the
Saskatchewan Roughriders. Pierce began the season as the third-string quarterback, making his CFL debut on August 19, 2005, versus
Hamilton. In this game, he completed all three of his passes and also threw his first CFL touchdown pass, to
running back Antonio Warren, in a 39-15 win over the Tiger-Cats. After injuries to starter
Dave Dickenson and backup
Casey Printers, Pierce earned his first career start in Week 16 at
Winnipeg (Oct 10/5), a 44-23 loss, completing 12-of-22 passes for 133 yards. After Casey Printers left for the
NFL in
2006, Pierce was elevated to the backup quarterback position behind Dave Dickenson. Once Dickenson was injured in week 8 against the
Edmonton Eskimos, Buck was again elevated to starter status, this time for two straight games and earned his first CFL win as a starter as the team won both games. Dickenson returned only to leave the September 24 game against the
Saskatchewan Roughriders with post-concussion symptoms, leaving Pierce to start the next game against the Tiger-Cats, also a win. He started each of the next three games until playing poorly in the third game against Hamilton where Dickenson reclaimed his starter's position. Pierce went 5-1 as a starter as he led the CFL in completion percentage (73.7%) and had the second highest
quarterback rating (109.0).. At the conclusion of the season, Pierce shared in the Lions championship, playing for a few snaps in the
94th Grey Cup. In
2007, then-starter
Dave Dickenson suffered yet another concussion, in week 3, and Pierce stepped up to assume the role of starting quarterback. By mid-August, Pierce was hobbled by injuries to his ribs, toe, hand, and shoulder, but he persevered in the starting role until finally relinquishing the role to third-stringer Jarious Jackson, who performed well himself. The Lions finished a team record 14-3-1, but succumbed to the
Saskatchewan Roughriders in the
West Final. Due to his frequent injuries, Pierce has been referred to as the
Lions' "walking bruise". As of the end of 2007, he had started 11 games as a Lion, compiling a mark of 7-3-1. With Dave Dickenson being released in the off-season, the starting quarterback's position was up for grabs for the
2008 season. Following the 2008 pre-season and a tough competition with back-up
Jarious Jackson, Pierce was named the
BC Lions starting quarterback. Because of an injury in the regular season opener, he acted as the back-up until Jackson's ineffective play led to Pierce returning as the starter against
Montreal on
Labour Day Weekend. After manhandling the Roughriders in the
West Semi-Final, he led the Lions to the
West Final against Calgary where they were defeated for the fourth time that season. The
2009 season saw Pierce struggle with concussions and shoulder injuries. He was sidelined with the former in week 7 on August 14 in a game against Toronto. He returned to play for the first time in week 12 on September 19, starting again against Toronto, after Jarious Jackson was injured in the previous game against Montreal. But again, Pierce was besieged with injuries and left the week 16 match-up with Winnipeg, leaving third stringer
Travis Lulay to carry out a victory. With Jackson sitting out the rest of the season, head coach
Wally Buono opted to sign former CFL
MOP Casey Printers. In the Winnipeg game, Lulay had also injured himself towards the end of the game, forcing Buono to start Printers for the final three games of the regular season. When Printers was knocked out of the finale against Edmonton on November 6, Pierce came in, in relief, and was again knocked out with a shoulder injury. At season end Buono stated that not all five quarterbacks would be back in
2010. On March 9, 2010, Buck Pierce was released by the BC Lions making him a free agent.
Winnipeg Blue Bombers Pierce signed with the
Winnipeg Blue Bombers of the
Canadian Football League on April 12, 2010. He started Winnipeg's opening game of the 2010 CFL season against Hamilton on July 2, 2010. Pierce fought through an injury-plagued season, making only five starts with only three of those coming consecutively. Despite backup
Steven Jyles playing well in his absence, the Blue Bombers showed their confidence in his progress in the off-season by trading Jyles to the
Toronto Argonauts in May 2011, leaving Pierce the undisputed starter. The
2011 Winnipeg Blue Bombers season began with significant optimism as the team hoped to make the playoffs after failing to qualify the last two seasons. One of the major questions regarding the team's potential was the health of their starting quarterback Buck Pierce, who had missed 13 games the previous year due to injury. Throughout the season Buck Pierce's health would prove to be a minor concern despite taking some viscous hits by defenders. The Blue Bombers jumped out to a 7-1 record to start the season, leading the Eastern Conference. After
Labour Day Weekend the Bombers began to struggle losing 6 of 9 games entering the final game of the season with a record of 10-8. Statistically Pierce did not have a great season, but he proved that he was a sufficiently healthy quarterback who could win games. The
2012 Winnipeg Blue Bombers season began with a great deal of optimism following the team's trip to the
99th Grey Cup in the previous season. Pierce sustained a leg injury in July which caused him to miss multiple games. In only his second game (September 29, 2012) back from injury Pierce took a violent hit to his head, from which he received a concussion. By the conclusion of the season Pierce had only played in 7 of the 18 regular season games. The Blue Bombers finished the year 6-12 and missed the playoffs. Heading into the
2013 season the Bombers released
Joey Elliott and
Alex Brink leaving Pierce as the only QB on the roster with any CFL experience. After Week 5, Pierce lost his starting job to
Justin Goltz, and fell to No.3 in the depth chart behind
Max Hall.
Return to BC With the rise of young quarterbacks,
Justin Goltz and
Max Hall in Winnipeg,
Joey Elliott being released in BC, and Pierce's inability to stay healthy, he was traded to BC on September 8, 2013, for non-import receiver
Akeem Foster. ==CFL statistics==