For some reason, the Pittsburgh Pirates were surprised that Wiz Khalifa would show his love for marijuana when the team invited him to throw the first pitch at a game. But that's exactly what he did.

It happened earlier this week when the Pirates took on the Baltimore Orioles and ended up winning.

But when the 'Black and Yellow' rapper got on the mound for the pitch, he did his signature hand move, where he mimics smoking a joint. On top of that, Wiz rocked a shirt that had the words "Legalize it" written on the front, and all of that was just too much for the suits who run Major League Baseball.

@wizkhalifa in the house for tonight’s first pitch! #BurghProud

A post shared by Pittsburgh Pirates (@pittsburghpirates) on Sep 27, 2017 at 4:40pm PDT

"Marijuana is a prohibited substance in all of our programs," the league said in a statement. "The Pirates have informed us this should not have happened."

[Related: Wiz Khalifa has angered Twitter with Memorial Day Tweet.]