41-years old, looked to be just about done early in the year, and now out of nowhere has allowed two earned runs or less in seven of his last eight starts. That includes one start vs. Boston where he did not allow an earned run in 6.2 innings. He now has a 2.14 ERA and 1.10 WHIP in three starts vs. the Red Sox this year.
Felix Doubront had a rough outing vs. the White Sox last time out, but I'll forgive him that considering he has been amazingly consistent this year, allowing three earned runs or less in 18 out of 19 starts before that last outing. More Here.
Felix Doubront had a rough outing vs. the White Sox last time out, but I'll forgive him that considering he has been amazingly consistent this year, allowing three earned runs or less in 18 out of 19 starts before that last outing. More Here.

Obviously exaggerating for effect but you get my point. Not too much weight should be put on pitcher vs. TEAM for past years because the teams are always different. Pitcher vs. BATTERS holds more weight, but even there you don't want to go back too far. And then there are cases like a few days ago with Max Scherzer vs. Red Sox where a pitcher has improved so much this year that past numbers before this year are close to meaningless.