Cash, Nash and Jessica Alba -- Huh?

12/27/2007 5:57 PM PST BY TMZ STAFF
In town to play the Los Angeles Clippers, Phoenix Suns guard Steve Nash (right) went out to lunch yesterday with his wife, Alejandra (center), some random guy (black jacket) -- and Jessica Alba (left) and Cash Warren (center). Weird group, right?

So not only did Cash Warren knock up -- and get engaged to -- one of the hottest women in Hollywood, but he hangs with the two-time NBA MVP, too! What's the deal with this guy?