BRADENTON, Fl. - Eric O'Flaherty wasn't just one of the best left-handed relievers in baseball prior to the 2015 season. He was one of the best relievers in baseball. From a results standpoint, he finished with the second best ERA among 105 relievers with 200+ innings from 2010-2014. He was also the top lefty during that span.
ERA isn't the best way to evaluate relievers, but his numbers held up in the advanced metrics. He finished 30th overall in xFIP in that same group, and 8th overall for lefties. His WPA during that span ranked 16th overall, and 2nd overall for lefties, finishing only behind Aroldis Chapman.