The Toronto Blue Jays found themselves in an awkward spot on Thursday night because of what essentially amounted to a clerical error.
Jays manager Charlie Montoyo thought he was making a routine pitching change when he sent out right-hander Jacob Waguespack in the bottom of the sixth inning, to take over for starter Nate Pearson.
The only problem was, Waguespack apparently wasn't on the active 28-man roster for the game.
The 26-year-old Louisiana native was informed of the bad news by home-plate umpire Alan Porter, and promptly headed off the mound before throwing a pitch.
Waguespack and an infielder were one of two players the Blue Jays had sent down to the minors earlier Thursday, but Montoyo said prior to Thursday's game that the team had recalled Waguespack to account for pitcher Trent Thornton going on the injured list.
But Waguespack's name did not appear on the pregame lineup cards given to the umpires, and thus he was unavailable to play in the game.
The Braves went on to win, 4-3, on a walk-off home run by Nick Markakis.