But when asked just how much blame he takes from the Dodgers' 25-30 record, 5 1/2 games out of first place in the National League West entering Tuesday's action, Mattingly seemed satisfied with the job he has done so far.
"I feel OK," Mattingly said. "There's always things during the game where you think, 'I should've done this, I should do that, should've bunted here,' but those are always things you look back at and look at it realistically and evaluate it from a baseball standpoint."
In his first season as manager, Mattingly said there is no mistake he hasn't learned from.
He said he often thinks about what he could or should have done after losses, sometimes waking up in the middle of the night and wondering.
But ultimately, he takes the same approach to managing as he did to playing: With enough tireless preparation, everything will fall into place, and there will be little to regret.