Clippers' Steve Ballmer richest pro sports owner

Forbes released its annual list of 400 Richest Americans, and not surprisingly, many prominent figures in sports made the cut.

The richest American owner of a U.S. sports team is Steve Ballmer, who bought the Los Angeles Clippers for $2 billion last August. With a net worth of $21.6 billion, Ballmer is the 21st richest American.

He's followed in the sports world by former Microsoft colleague Paul Allen ($17.6 billion), who owns the Seattle Seahawks and the Portland Trail Blazers.