Hector Alejandro has had quite a summer pitching for the Bristol Blues. In his first appearance for the Blues, he gave up 6 runs, 4 of them earned (2 errors behind him), 2 hits, 2 walks while not getting anyone out. That will do wonders for your ERA. It was also the first official game he had pitched all season, as he redshirted at UConn this spring.
Since that one appearance, Alejandro has been quite good, and he has been used quite a bit. 10 more appearances all in relief, 17.2 innings, 1 earned run against him, 7 hits, 6 walks, 17 strikeouts in those 10 appearances. His ERA now stands at 2.54 which includes that first appearance when he didn't get anyone out.