I generally have a longer leash on hitters than pitchers, though I very rarely go to the WW.
I recently did so in “The Opener” theme, where my 1999 Derek Lowe made 12 appearances, and had 3 losses, and 2 blown saves in relief for a 7.17ERA and 1.81WHIP.
I cut him in frustration and then was without a replacement for some time. In the end I made a few swaps in order to get the $ to work out, and I feel like my team is better overall.
I ended up cutting 1979 C Darrel Porter (.162/.285/.210 after 32 games) and replacing with 2001 Pudge (.302/.324/.385 in 25 games), and then also dropping 2008 CC Sabathia who’d been ok for me (30.2IP, 3.26ERA/1.35WHIP) and picking up 2013 Neil Cotts and 2018 Chris Sale (27.2IP, 1.30ERA/0.76WHIP).