Miguel Montero left Chicago under ugly circumstances, and upon his return to face the Cubs on Friday he was greeted with boos. After criticizing Jake Arrieta by saying his speed to the plate allowed for the Nationals to steal so many bases, Montero was DFA'd on June 28 and traded to the Blue Jays on July 3. Some might remember Montero's time as a Cub for his grand slam in the bottom of the eighth inning in Game 1 of the NLCS against the Dodgers. But not everyone. Montero was welcomed back to the not-so-friendly confines of Wrigley Field on Friday with boos. And who was on the mound for the Cubs? Jake Arrieta.