Should i accept this trade?

greinke has been lights out to begin the season, but he's been slipping a little. in my opinion, chris carpenter has been great since he came off the DL this season, and the cards are one of the best teams in the NL, so he should continue dominate the NL. greinke has shown signs of wear and tear as teams are getting to him now. he was unstoppable to begin the season, but he's looking more human. i would do it. boston is the best team in AL and youkilis should continue to do his thing. branyan and zimm are pretty good, but you can now use any of the 3B to dangle as trade bait to address another area you're weak in.