Bolds, a redshirt freshman defensive tackle from New Jersey, announced his intentions to transfer via Twitter on Sunday.
"There's not a whole lot of difference between Baker Mayfield and Trace McSorley. In fact, I would argue Trace throws it every bit as well, if not better, than Baker," Dilfer said.
The Pirates will take on the Cincinnati Reds on June 16 with a portion of ticket proceeds going towards THON.