Do the Trade! Wheeler is a future #2 at worst. Perkins gives you Saves now, which Pestano may never do. Yes, Archer is a guy for the future, but I wouldn't rate him as a must-have.
When you're in a dynasty league, these guys can be difference makers....Wheeler could be a future stud pitcher and Pestano could be the Indians closer of the future. I know you wouldn't understand though, playing your six team, one year leagues.
