After rough Wild Card Series ball/strike calls, higher-rated umpires up for Division Series games
POV: Bad Umpiring Hurt Baseball in 2021, Especially in the Playoffs. It's Time for Change, BU Today
We May Never Find Out How Good Umpires Can Be
How soon could robot umps and 62-foot, 6-inch mound come to MLB? - ESPN
Has Expanded Replay Worked Well In Baseball? Here's Our Call
Umpire Scorecards Accuracy and Expected Stats
Half of MLB video review challenges led to overturned calls
They Call 'Em Like They See 'Em - Twinkie Town
Josh Donaldson calls ump 'top 3 worst' despite 99% accuracy
MLB umpires need tech help at the plate, says researcher