Oops, 84 vs 88. Still not enough to get worked up over.
one gets it wrong once every six throws. the other gets it wrong once every eight.
comsider that across an entire game. then across an entire season.
it is a big difference.
Also, each ump has their own strike zone. Players don’t generally get mad as long as they are consistent.
So for example for a player it is preferable for an ump can consistently call a low strike which would lower his percentage number vs a ump with a better number but moves his strike zone around.