Rasmus followed his brother, Colby, to the Rays with the hope that the pair might appear on the same big league roster for the first time. Yet the groin gods struck after Cory appeared in his only spring game.
After a brief MLB debut (and stint) with the Atlanta Braves in 2013, Rasmus spent the majority of the past four seasons with the Angels organization, where he found success in both 2013 and 2014. However, he struggled the past two seasons, pitching to a combined 5.56 ERA in 45-1/3 innings. Between 2013 and 2016, Rasmus amassed a 4.17 ERA/4.49 FIP in 84 games (eight starts) across 123 innings.