Set shortly after World War I, Leatherheads stars George Clooney as the crafty captain of a professional football team and John Krasinki as the star player and all-American hero with a questionable war record. Renee Zellweger is the woman torn between them. If you pay attention, you may learn something about the evolution of professional football, but it’s more fun to bask in Clooney’s effortless, eye-winking sexiness. Even The Office’s Krasinksi, still in the Jim-and-Pam heyday, can't compete as a romantic rival. But it's fun to watch him try.