One thing that this thread allowed me to do is actually keep track of games where Tony LaRussa did something specific that caused a blowup.
1-Apr Failing to make review time window, Leury starts opening day, no pinch hitter for him late.
3-Apr Bullpen Usage - Bummer never used, Marshall allowed to blow game in the 9th.
4-Apr Bullpen usage - Hendriks not used in the 9th, Ruiz and Foster blow it.
*Several times could have PH for Leury or Hamilton, not done
7-Apr Bullpen usage - Foster comes in with Bummer and Hendriks needing work, gives up 5 runs.
11-Apr Couple of poorly thought out bunts, pinch running for Mercedes early left no backup Ofs
13-Apr Williams hits 5th, Lamb hits 7th, Mercedes benched against Bieber. Could have kept Hendriks out to start the 10th.
27-Apr Attempts to kill Lucas Giolito. "We were looking for a single there." Insists postgame that he was awake.
5-May Messes up double-switch, runs team out of 10th inning, rulebook read to him by reporter.
Bolded are games where managerial decisions are particularly troublesome. Numerous other games - Vaughn, Madrigal being benched for Leury, Hamilton, and Williams. Lack of offdays for Abreu, Eaton.
There's at least 8 games so far this season where the manager has been a contributing factor in a loss, without counting guys that he chose to bench on the list more than once. Changing to a competent manager doesn't turn all of those into wins - maybe a better lineup still loses to Bieber as Cleveland's bullpen is outpitching us, maybe someone still gives up runs out of the bullpen, etc. But there's an awful lot of high-leverage events so far this season where people have been saying "the Manager contributed to a bad thing happening".