Except that, as bad as Porcello's been, Lester's been pretty much a league-average pitcher (102 ERA+), but the key here is SO FAR. You can't judge either his or Porcello's contract based on three months of play. Porcello has proven nothing, and neither has Lester, until they've played a significant amount of time from their contracts. The Lackey deal looked like an unmitigated disaster at first, yet look at how it turned out.