First Derek Jeter and now A-Rod!
"They broke up recently," a source close to the 36-year-old slugger told Us Weekly.
The source said the low-profile relationship -- which included trips to Miami and late-nights in New York -- ended because A-Rod and Diaz are addicted to their jobs.
"She's very busy with her career," the source said of the 39-year-old actress. "And he's had injuries and wants to focus on his game. They're dedicated professionals."
A-Rod has a home in Miami and he and Diaz had recently been spotted together buying artwork to decorate it at several New York galleries.