Aceves came into the season as one of Boston's better options as a setup man. He loosened up in Spring to possibly become a starter but when Andrew Bailey went down with an injury, Aceves was turned into the closer. He definitely had the confidence to be a good closer, but he did not always have the best results. Aceves finished the year at 2-10 with a 5.36 ERA. He did save 25 games though. He struggled down the stretch, but had been having a decent season early on. He will likely return to a setup and swing man role in 2013.