Yoenis Céspedes
Storen relinquished his closer role when Jonathan Papelbon was acquired by the Nationals from Philadelphia just before the trade deadline. He struggled as the Nationals' setup man, ending with two disastrous outings against the New York Mets in early September. After giving up the go-ahead runs on a homer by Yoenis Céspedes, Storen slammed a locker in frustration, breaking his thumb and ending his season. He went 2–2 with a 3.44 ERA for the year but was 0–2 with a 9.22 ERA after the Papelbon trade.