The Blue Jays selected McAdoo's contract from Triple-A Buffalo on Thursday.
With Lenyn Sosa (wrist) headed for the injured list, the Blue Jays will turn to McAdoo to fill in as infield depth. The 24-year-old has slashed .250/.357/.432 with eight home runs, 27 RBI, 31 runs and seven steals through 50 games at Buffalo, and he'll be making his MLB debut whenever he gets into a game.