Ah Yat was a four-year letterman for the Montana Grizzlies of the University of Montana from 1995 to 1998.[1] He was a backup to Dave Dickenson when the 1995 Grizzlies won the NCAA Division I-AA national championship.[2] Ah Yat was then a three-year starter from 1996 to 1998.[2] He recorded 3,744 yards of total offense and a conference-record 42 touchdown passes in 1996, earning first-team All-Big Sky Conference and Big Sky Offensive MVP honors.[2][3] He also set a school record for passing yards in a game that season with 560 yards against Eastern Washington.[2] He led the 1996 Grizzlies to the 1996 NCAA Division I-AA Football Championship Game, where they lost to Marshall by a score of 49–29.[2] He was named second-team All-Big Sky in 1997.[2] As a senior in 1998, Ah Yat once again earned first-team All-Big Sky and Big Sky Offensive MVP honors after leading the conference in total offense for the second time with 2,944 yards and also scoring 26 passing touchdowns.[2][3] He totaled 9,320 yards of offense during his college career and led the Grizzlies to the playoffs all three seasons he was a starter.[2] He played in the Hula Bowl after his senior season.[3] He was inducted into the school's athletics hall of fame in 2021.[2]
In May 1999, Ah Yat left the Hammerheads to sign with the Winnipeg Blue Bombers of the Canadian Football League (CFL).[4] He dressed in all 18 games for the Blue Bombers during the 1999 CFL season and threw two incomplete passes.[1] He dressed in nine games in 2000 but did not record any statistics.[1] Ah Yat dressed in 18 games for the second season, starting one, in 2001, completing 14 of 27 passes (51.9%) for 188 yards, two touchdowns, and two interceptions.[1] He became a free agent in February 2002.[5][6]
Ah Yat signed with the Chicago Rush of the Arena Football League on December 5, 2002.[7] He played in two games, starting one, for the Rush during the 2002 season, completing three of 12 passes (25.0%) for 43 yards, one touchdown, and one interception.[8][1]
^"Brian Ah Yat". cflapedia.com. Retrieved November 29, 2014.
^Maher, Tod; Gill, Bob (2013). The Canadian Pro Football Encyclopedia: Every Player, Coach and Game, 1946–2012. Maher Sports Media. p. 141. ISBN978-0983513667.