Collaros played college football for the Cincinnati Bearcats, and has also been a member of the Tampa Bay Buccaneers, Hamilton Tiger-Cats, Saskatchewan Roughriders and Toronto Argonauts.

Collaros graduated from Steubenville (Ohio) High School in 2007, after leading the Big Red to Division III state titles in the 2005 and 2006 seasons, ending with an undefeated 30-0 record as a starter.

[1] After Tony Pike was injured in the Akron game, Collaros took his first snap as college quarterback halfway through the fourth quarter.

[3] When Pike was injured midway through the 2009 season, during a game against South Florida, Collaros again took over; on his third snap, he ran for a key 75-yard touchdown.

On May 4, 2016, Tiger-Cats head coach Kent Austin announced that Collaros would be limited in training camp, and likely miss the start of the 2016 regular season as he recovers from his torn ACL injury.

[18] Prior to Week 8, and almost 11 months since sustaining his knee injury, Collaros returned to practising with the first team offense.

[27] Collaros was unable to play in the Western Semi-Final playoff game because of a concussion, and the Riders were defeated by the Blue Bombers 23-18, ending their season.

[30] Collaros was knocked out of the first game of the season when he was hit in the head by Ti-Cats linebacker Simoni Lawrence while attempting to slide.

[32] On July 31, 2019, Collaros was traded to the Argonauts in exchange for a conditional fourth round pick in the 2020 CFL Draft.

[38][39] Collaros threw his first passes of the year to count (his lone attempt for the Roughriders was wiped out due to a defensive penalty) and lead the Blue Bombers to a victory in their season finale.

"[41] On January 27, 2020, Collaros and the Bombers agreed to a two-year contract extension, preventing him from becoming a free agent on February 11.

He entered the 2021 Winnipeg Blue Bombers season as the undisputed starter and completed 18 of 28 pass attempts for 217 yards and two touchdowns in the season-opening Grey Cup rematch against the Hamilton Tiger-Cats.

[44] The Blue Bombers clinched first place in the league in week 12 with three games remaining as Collaros had a 10–1 record as the team's starting quarterback.

[46] In Winnipeg's first West Final playoff game since 1972, Collaros completed 17 out of 21 pass attempts for 229 yards, one touchdown, and three interceptions in the victory over the Saskatchewan Roughriders.

Collaros completed 21 of 32 pass attempts for 240 yards, two touchdowns, and two interceptions in the 33–25 overtime victory over the Tiger-Cats and he was named the Grey Cup Most Valuable Player.

[48] Collaros continued his impressive play into the 2022 season leading the Bombers to a second consecutive first place finish in the Western Division.

With three weeks remaining in the season, and a first-round bye already secured, the Bombers began resting Collaros for the playoffs.

In the playoffs Collaros helped lead the Bombers to their third consecutive Grey Cup appearance where they were favored against the underdog Toronto Argos.

Hoping to become the first team in 40 years to win three consecutive Grey Cups, the Bombers lead 23-14 by the start of the 4th quarter.

Collaros played poorly in the game completing only 14 out of 23 pass attempts for 183 yards, one interception and no touchdowns, his worst performance of the season.