Arroyo did not pitch last season as he recovered from Tommy John surgery. He most recently played for the Arizona Diamondbacks in 2014, making 14 starts. Arroyo was 7–4 with a 4.08 ERA with the Diamondbacks.
Before joining Arizona, Arroyo spent eight seasons with the Reds. He has also pitched for the Pittsburgh Pirates and Boston Red Sox. In his career, Arroyo has made 369 starts, compiling a 145–131 record with 1,526 strikeouts and a 4.19 ERA.