Never.Lemme guess, you’re someone who plays a lot of fantasy baseball, right?
Just pointed out that he has missed a number of games during his career, so perhaps his value wasn't quite what some people think it was. Sure, he had an OPS+ of 106 in his last six seasons but also only played in 51% of the Red Sox games during that period and a few of them weren't starts. So that essentially leaves three choices: the substitutes played worse than he did, which means his missing half the games hurt the team; they played equal to his performance, which means that it doesn't make much difference except possibly salary; or they played better than he did. Take your pick.