Clips' Ballmer richest NBA owner at $22.5B

Sports owners filled the annual list of the 400 richest Americans published by Forbes magazine on Monday, including new Los Angeles Clippers owner Steve Ballmer, who at a net worth of $22.5 billion is the richest American owner of a sports team.

Ballmer, who spent 34 years at Microsoft, bought the Clippers in August from Donald and Shelly Sterling for $2 billion, after they were essentially forced to sell following Sterling's much-publicized racist comments. Ballmer is the 18th-richest American.

Microsoft co-founder Paul Allen, who owns both the Portland Trail Blazers and Seattle Seahawks, came in as the second-richest sports owner with a net worth of $17 billion (27th on the list).