Cameron Diaz, Alex Rodriguez split -- report

After a year back together, Cameron Diaz and Alex Rodriguez have called their relationship quits again, reports Us Weekly.

"They broke up recently," a source tells Us magazine.

The couple first started dating in 2010 and according to the New York Post, the had been spotted together recently in Miami, where A-Rod has a house But their commitment to their careers apparently come first.

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

Perhaps there's something in the Yankees' water supply? Rodriguez's teammate Derek Jeter and longtime girlfriend Minka Kelly split in August.