nooooo i definitely wouldn't do that. you have desmond jennings and oscar taveras sitting there who could potentially be five-tool-uptonesque players, and your SP depth isn't deep enough to lose a pitcher of the caliber of madison bumgarner, who i dont think we've seen the best of yet.
yeah you've got cain, but i think greinke is overrated, halladay is old with lower velocity, johan santana is old/injured, marcum is overrated, volquez's best days are longer and logner past him, and if he's on wandy t is just about the last SP on a solid team's staff, not a championship winning team. i'd sooner move pence like somebody upthread said.... while upton's prolly likely to have a stats increase and indeed if that's hte case this might be the the last chance to get him at a discount, still, i'd hedge my bets on desmond jennings and oscar taveras developing into players who could give you production that would make up for the production "lost" by not acquiring upton, but with bumgarner you're losing your solidly-entrenched #2 pitcher who has upside that might even go beyond cain's, and with bummy moved you're counting on two guys in halladay and johan to step up and reclaim past glory to cement their #2 position on your staff, and given that father time is an unforgiving sonovabitch i definitely wouldn't do that. i have to disclaim that i'm a bumgarner guy and i have him in a bunch of leagues, most notably my superdeep 20 team 15-keeper league, which means i invested an early/ish draft pick in him in 2011 to make sure i had him for 2012-2013 and beyond and thus far it's worked out well. he's got nasty stuff and he's lefty and he's only 23. don't give up on that and a nice lottery ticket to get upton at a low price.... while it's tempting considering this might be the last chance to get him @ a song.... given your specific situation i wouldn't wanna risk crippling my pitching in order to further stack a lineup that'll do fine with or without him, especially when you're sitting on taveras for the future and desmond jennings coulkd go 20/20 and have most of the value that you'd get from upton. granted you'd have them both, still, your team isn't stacked enough @ SP to give up bumgarner and not be pretty severely hurt by doing so
take a look @ my thread, would ye?!!? viewtopic.php?t=457100