Houston Astros catcher Martin Maldonado used an illegal bat in Game 1 of the World Series on Friday, which was gifted to him by Albert Pujols – a model that the future Hall of Famer was allowed to use because he was grandfathered in.

In 2010, Major League Baseball tightened its regulations on maple bats due to safety concerns about splintering, but players who were in the league prior to 2010 were allowed to continue using their preferred models.