Gary Tuck was set to be the only Red Sox coach to return from the 2012 season — until he wasn’t.

Earlier this week Tuck abruptly announced his retirement from baseball, meaning that Red Sox catchers will no longer get the benefit of Tuck’s tutelage behind the dish. Players from Jason Varitek to non-Red Sox Jorge Posada have praised Tuck’s defensive instruction in the past, so the loss is certainly a blow to young backstops like Ryan Lavarnway. Meanwhile, Boston will have to scramble for a new bullpen instructor as manager John Farrell was apparently “taken aback” by the decision, and the timing is certainly a bit odd.

Check out the video above for Don Orsillo and Nick Cafardo‘s breakdown of what Tuck’s resignation means for the Sox.