Quackenbush begins his first season with the Ducks and 12th in professional baseball. The six-year MLB veteran pitched for three teams in the Major Leagues, including four seasons with the San Diego Padres (2014-17) and one each with the Cincinnati Reds (2018) and Los Angeles Dodgers (2021). He appeared in 204 games, tallying a record of 13-15 with a 4.41 ERA, 8 saves and 187 strikeouts to 82 walks over the course of 208 innings pitched. The Florida native made his MLB debut on April 25, 2014 at Washington against the Nationals on the same day he was called up to The Show, retiring the first batter he faced in Ian Desmond by way of a groundout.

The 34-year-old earned his first win in the Big Leagues on May 27, 2014 in relief for the Padres at Chase Field over the Arizona Diamondbacks, erasing all four batters he faced on just 13 pitches thrown. The right-hander recorded his first career save on August 20th at Dodger Stadium, tossing a scoreless ninth inning en route to a 4-1 Padres victory over their division rival. Quackenbush was named a second team All-American in 2011 when he played college baseball for the University of South Florida Bulls.