Joe Morgan until very recently always vastly under performed for me so I stopped using him. I'm using him in a 120 mil theme league and he's doing great.
Kershaw, Josh Gibson, Bagwell all typically under produce for me. But I am good at getting injuries out of Gibson and Bagwell! Kershaw is especially frustrating, as his non-* card Diamond Dopes so well.
I'll throw my hat into the stolen bases camp as well.
He is more expensive than both Hack and Kiner and he vastly underperforms BOTH at DH...Sosa isn't worth more than $9.50 TOPS and that with his non injury figured in.