Pitchers will be ejected and suspended for 10 games for using illegal foreign substances to doctor baseballs in a crackdown by Major League Baseball that will start June 21.
The commissioner's office, responding to record strikeouts and a league batting average at a more than half-century low, said Tuesday that major and minor league umpires will start regular checks of all pitchers, even if opposing managers don't request inspections.
Repeat offenders will receive progressive discipline, and teams and club employees will be subject to discipline for failure to comply.
Umpires will perform period checks of all starting and relief pitchers on both teams throughout each game, MLB said.