Madison Bumgarner is known for policing the game on the field and now he's trying to control it before he even gets on it.

After the Giants' new president of baseball operations Farhan Zaidi told reporters in December he could embrace an "opener" strategy, Bumgarner reportedly shot a quick, firm text to San Francisco manager Bruce Bochy.

“If you use an opener in my game I’m walking right out of the ballpark," the text read, according to NBC Sports Bay Area.

Bumgarner went 6-7 with a 3.26 ERA for the Giants last season and held opponents to a .193 batting average in their first plate appearance.