Two days shy of his 30th birthday, the 2010 and 2011 America East Pitcher of the Year winner appeared in an MLB game for the first time in 13 months. Tropeano pitched four scoreless innings against the Chicago White Sox in his season debut.

On Monday, March 2, Koehler abruptly announced his retirement on social media at the age of 33, posting a picture of him hanging up his cleats on Instagram.