Mike Piazza lives by one rule as a parent: You don’t have to like me, but you do have to respect me. Actually, that's a pretty good rule for life, says the baseball Hall of Famer. "The first rule — to try to be happy — is to not care what people think," Piazza told TODAY Parents.

Retired from the game in 2008, now living in Italy with his wife and three children, Piazza chatted with TODAY Parents while visiting New York and his former team, the Mets. A lot has changed since his playing days, and Piazza just smiles at the rise of social media.