By Antoinette Bueno
Axelle/Bauer-Griffin/FilmMagic
Late last month, the 45-year-old former baseball pro showed off his impressive body transformation after four months of consistently working out and watching what he eats. In March, he also shared that he was taking part in the 54D program, a nine-week training program that combines high-intensity group training, custom nutrition and recovery therapy. A source tells ET that after his breakup with 51-year-old Lopez, he has made it a goal to shed his "dad bod."
"He 100 percent kicked it into high gear over the last few months," the source says. "He knows how good he looks when all dressed up with somewhere to go now. He wants to look good for his ex or any woman."