Being a home plate umpire at the major league level isn't the easiest job in the world and mistakes are often made thanks partly to pitchers throwing really nasty stuff these days and, well, the element of human error.

The latter of that was on display during Wednesday's Diamondacks-Rangers game in Arlington when Derek Thomas messed up something that should be easy for home plate umpires to keep track of—the count.

Arizona's Adrian Del Castillo was up in the fifth inning with two runners on. Thomas then rang him up on a called strike, only to quickly realize that was just the second strike of Del Castillo's at-bat. Thomas quickly corrected himself and let everyone know that it wasn't a strikeout.

The announcers had a good laugh over this:

Del Castillo lined the next pitch to right field for a hit and then Thomas redeemed himself by making an easy call at home plate as Ketel Martel was thrown out trying to score.

Still, you have to think Thomas might hear a thing or two from his umpiring buddies over that glaring mistake on what was strike two.