Adjusting for opportunity, the difference between Lee and Choi this season works out to be about 55 runs, or 5-6 wins. In your proposed scenario, I'd say that a Cubs team with Choi+$8 million worth of produciton elsewhere would finish 3-4 games behind the Cubs with Lee manning first. Worse, but not radically so. Sub in Tracy for Choi, and difference dwindles down to a game or less... I just have an incredibly hard time buying that. Downgrading at 1st base from the most productive player in baseball this year, to a much poorer defensive first baseman who has a sub-.800 OPS would only cost us 5-6 games? Wouldn't that be comprable to saying that if we had Vlad or Manny in LF this year, we would only have been 3-4 games better? It's only a .230 differential in OPS as opposed to roughly 300 points in the case of Lee/Choi. I guess I just have a difficult time believing that if Vlad or Manny were our everyday LF and no other changes to the lineup were made, we would only have been able to win roughly 4 additional games. Things like that are just seem incredibly difficult to measure in my opinion.