Guerrero won't play in Saturday's game against the Yankees due to back tightness, Mitch Bannon of The Athletic reports.
Manager John Schneider said Saturday that Guerrero began having problems with his back Friday, so the Jays will sit him down as a precaution. Schneider added that the slugging first baseman is already beginning to feel better, so an extended absence doesn't seem likely. Charles McAdoo will get the nod at first base and bat eighth while Guerrero rests.