CAMERON DIAZ, A-ROD SPLIT

They'll always have Mexico --- and Miami, London, NYC and L.A.

After a year back together, Cameron Diaz and Alex Rodriguez have ended their romance. "They broke up recently," a source close to the Yankee slugger, 36, confirms to Us Weekly.

The duo's low-profile love was marked by beach getaways and intense workouts together. So what got in the way? Their work ethic!

"She's very busy with her career," the source says of Bad Teacher actress Diaz, 39. "And he's had injuries and wants to focus on his game. They're dedicated professionals."