I am NOT saying that Pete Sell isn't good.
I have gone to Sherdog and looked up his record. His opponents aren't exactly the kind who can test a fighter to ensure he's up to snuff. Of the three that he has fought, the last two (same guy) is 1 and 3 and the one before that is 0 and 3.
Zuffa missed a real chance to sign a Team Potato fighter to send Baroni off from the UFC.