Auburn Doubledays
In June 2007, Rzepczynski was drafted in the fifth round (175th overall) of the 2007 Major League Baseball draft by the Toronto Blue Jays. He made his professional debut that season for the short-season Jays' Class A affiliate Auburn Doubledays of the New York–Penn League. With Auburn, he posted a 5–0 record and a 2.76 ERA in 11 games (7 starts), with 49 strikeouts and 17 walks in innings pitched.