WWE Superstar Seth Rollins -- I Took a Potty Break ... DURING A MATCH!

WWE Superstar Seth Rollins got real pissy during a wrestling event last week -- and by pissy, we mean he went pee in the middle of a match.

Rollins dropped the urinary news during an interview with the Wonder Years lead singer Dan Campbell ... after Seth was asked what his all-time worst mistake in the ring was.

The ex-tag champ says he badly had to go during the match ... but the best part is how he solved the problem.

Believe in the not breaking the seal.