He is a former professional quarterback who played nine seasons for the Lions and Winnipeg Blue Bombers of the Canadian Football League (CFL).

[1] He played in two Grey Cup games, winning a championship in 2006 and also won as part of the coaching staff with the Winnipeg Blue Bombers in 2019 and 2021.

The son of Tim and Connie Pierce, he attended Del Norte High School, in Crescent City, California.

He passed for 2,225 yards and 25 touchdowns as a senior in 1999, earning Big 5 Conference Most Valuable Player honors for the second consecutive season.

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.

[3] After injuries to starter Dave Dickenson and backup Casey Printers, Pierce earned his first career start in Week 16 at Winnipeg (Oct 10/05), a 44-23 loss, completing 12-of-22 passes for 133 yards.

In 2007, then-starter Dave Dickenson suffered yet another concussion, in week 3, and Pierce stepped up to assume the role of starting quarterback.

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.

[6] 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.

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.

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.

[15] On January 21, 2020, Pierce was named the offensive coordinator for the Blue Bombers as the incumbent, Paul LaPolice, left the team to become head coach of the Ottawa Redblacks.