When A.J. Preller went all out at the trade deadline, he quite literally addressed every need possible. He acquired a pair of impact bats, upgrading at the catcher position, and brought in one of the most electric relief pitchers in the game right now. Preller did all of this at the expense of the farm system, as 13 prospects were traded away in the final 48 hours leading up to the deadline.
Despite filling every hole, a new weakness on the roster doesn't get nearly as much attention: the back end of the rotation. Behind Nick Pivetta, Michael King, and maybe Dylan Cease, the fourth and fifth starters in the rotation have provided little to no value.