![](https://www.thestar.com/content/dam/thestar/sports/bluejays/2018/06/23/mlb-players-and-umps-bank-on-sounds-of-the-game/catcher_s_mitt.jpg)
The distinct sound of a pitch in a catcher’s mitt can affect a strike call. Umpires will go by what they hear on a hit by pitch, or a bang-bang play at first. Pitchers know what a hit sounds like off the bat. The Blue Jays have learned the difference between baseball’s good sounds and bad.