K-Fed Loses Custody ... of His Belly

3/28/2010 2:15 AM PDT
A post "Celebrity Fit Club" Kevin Federline has come out swinging ... and thinner.

The 32-year-old father of four played golf in L.A. on Friday, looking much fitter than he did back in July of last year.

It's only been eight months, but K-Fed has already lost all the baby weight.