The Pirates’ starting rotation, touted as perhaps the National League’s finest entering 2019, has instead been a train wreck. The long-term health of 2018 ace Jameson Taillon is yet again in doubt. Big-ticket trade deadline acquisition Chris Archer is serving up more taters than Potato Patch at Kennywood. Trevor Williams and Joe Musgrove have been adequate, if somewhat underwhelming. The just-traded Jordan Lyles, after a dominant April, was rocked. Add it up, and you have a starting corps that has the worst park-and-league-adjusted ERA (20 percent worse than the MLB average) among NL teams.