He played in Major League Baseball (MLB) for the San Francisco Giants, Arizona Diamondbacks, and Toronto Blue Jays.

Bergen pitched in only 14 games combined in 2016 and 2017 for Vancouver and the Rookie-level Gulf Coast Blue Jays due to injuries.

[6] In 2018 he played for the High–A Dunedin Blue Jays and Double–A New Hampshire Fisher Cats, combining to go 4–2 with a 0.95 ERA and 74 strikeouts in 562⁄3 innings pitched.

[7] He made his major league debut on March 29, 2019, versus the San Diego Padres, and retired Ian Kinsler on a ground ball, the only batter he faced.

[12] On August 31, 2020, the Blue Jays traded Bergen to the Arizona Diamondbacks in exchange for Robbie Ray and cash considerations.