Pitch framing has become much more well known in the last four or five years. Some catchers can receive borderline pitches in such a way that they win more strike calls than most players from umpires. It’s the one area where Kansas City Royals catcher Salvador Perez has struggled his entire career.
For example, in 2016, Perez ranks 34th among all catchers with a sample size of more than 4,000 pitches at StatCorner.com’s pitch framing rankings.
So, one might conclude that pitch framing might just be Salvador Perez’s defensive Achilles Heel.