Just call Preston Federline "slugger!"  The five-year-old son of Britney Spears and Kevin Federline was one of the star players for the West Hills Yankees in their Little League game Sunday in suburban Los Angeles.

Dad K-Fed is a team's coaches and proudly cheered his son on while wearing shirt and hat matching Preston.

In the stands -- and right behind home base -- was Preston's equally proud mom who was joined by her younger son Jayden and her talent agent boyfriend Jason Trawick.