
Erwin appeared in 20 games for the Cats this season, compiling a 2-3 record with a 3.98 earned run average and a league leading 10 saves. The native of Alvin, TX recorded 19 strikeouts in 20.1 innings pitched. Erwin, who was in his second year with Thunder Bay, set a franchise record by appearing in 38 games last season, going 2-3 with five saves and a 4.84 ERA.
Erwin will report on Friday to the Phillies minor league complex in Clearwater, Florida.