The former professional baseball player has been hitting the gym with the singer, and praised his 48-year-old partner's workout skills, reported Us Weekly magazine.
"Jennifer is an incredible athlete. She's a former star athlete going back to junior high and high school. And we both just love the fitness space, we like to work out. We work out together, we workout apart. Yeah, she's great," Rodriguez said.
The couple started dating just a couple of months ago. They both have children from previous relationships - Rodriguez, 42, has daughters Natasha, 12, and Ella, nine, with ex Cynthia Scurtis, while Jennifer is mother to nine-year-old twins Emme and Max from her marriage to Marc Anthony.