[1] He made the team again in 1983 and saw his first professional action on December 19, 1983, replacing Tony Eason during the fourth quarter of the season finale against the Seattle Seahawks.

[3] He was cut following the 1984 preseason and tried out for the Los Angeles Rams and the Edmonton Eskimos before returning to the Patriots following an injury to Eason.

When Raymond Berry took over as head coach later that season, he decided to add a third quarterback and brought back Kerrigan.

[4] Kerrigan appeared in one game versus Indianapolis, completing one pass for 13 yards, leading the offense on a fourth-quarter touchdown drive.

[6] In 1986, Kerrigan signed with the Hamilton Tiger-Cats and competed with Tom Porras, Mark Casale, and Wilson Fraylon for the backup quarterback job.

[8] He was named an Eastern Division All-Star by the Football Reporters of Canada and led the Ti-Cats to a 39–15 upset victory over the 12-point favourite Edmonton Eskimos in the 74th Grey Cup.

[9] Both Kerrigan and Hobart missed much of the 1987 due to injury, which led to Tom Porras receiving most of the playing time that year.

[12] Although he missed the last six games, Kerrigan finished fourth in the league in passing yards (2,764) and second in completion percentage (55%).

He was signed by Toronto general manager Mike McCarthy, who had also brought Kerrigan to Hamilton when he was the Tiger-Cats director of player personnel.

He threw a 43-yard touchdown pass to Darrell K. Smith put the Argonauts ahead by one point with a minute left in the fourth quarter.

[23] In 1993, the Argonauts brought in Tracy Ham to be the starter and Kerrigan beat out Chris Flynn for the backup job.

[37] He returned to active roster on August 29 as the backup to Marvin Graves following injuries to Matt Dunigan and Anthony Calvillo.

[39] He continued in his dual role as coach and player until September 11, when John Jenkins was rehired as offensive coordinator.

[43] Kerrigan married a member of Brock University's food services department that he met while the Tiger-Cats held training camp there.