The 42-year-old retired MLB star shared a sweet photo with Lopez's son, 10-year-old Max, on Instagram.
The picture shows Rodriguez holding Max while also embracing a young woman. Lopez is parent to Max and his twin sister, Emme, while Rodriguez is dad to two daughters, 13-year-old Natasha and 10-year-old Ella.
Lopez shares Max and Emme with ex-husband Marc Anthony, while Rodriguez is parent to his daughters with ex-wife Cynthia Scurtis. Lopez responded this month after Rodriguez called her a great role model for his daughters.
"He's so lovely and he's so supportive and encouraging of everything I do," the singer told Entertainment Tonight.
"I'm glad that he sees me that way, that I would be a good role model to his girls. You know, I'm just trying to be a good mom to mine and the best I can be for all four of them," she added.