By peoplestaff225
Updated October 30, 2009 04:40 PM

Early retirement is treating Mike Piazza well. The former all-star New York Mets catcher and wife Alicia Rickter are now raising two daughters, having welcomed new addition Paulina Sophia Piazza to the family.

“We are blessed to have two healthy girls – we are so grateful,” Mike, 41, tells PEOPLE.

Paulina arrived on Monday, August 3rd at Mount Sinai Medical Center in Miami, weighing 6 lbs., 3 oz., and measuring 24 ½ inches long. She and mom Alicia, 37, an actress and former Playboy model, are healthy and happy, says a Piazza rep.

Paulina is the Piazza’s second daughter. Big sister Nicoletta Veronica, 2 ½, is thrilled with her new little sister, and Mike says that having two kids is double the fun. “Being a father – it’s the most rewarding thing I’ve ever done,” he says.

When the former catcher – who announced his retirement on May 20, 2008 – is not changing diapers and burping babies, he’s busy coaching the Italian national team entry for the World Baseball Classic. As he said prior to Paulina’s arrival, “I’m excited to be at home and enjoy moments with my kid.”

— Lorenzo Benet