Boise Hawks
Rapda signed as an Undrafted Free Agent with the Chicago Cubs during the summer of 2002. Rapada started in the Chicago Cubs organization pitching for the Single-A Boise Hawks from 2002 to 2003. At the beginning of 2003, he was promoted to the Single-A Lansing Lugnuts, where he posted a 4.96 earned run average (ERA) and recorded 27 strikeouts over innings pitched, primarily in relief.