Shemar Moore -- My Girlfriend's The Hottest Woman In Sports

What do Serena Williams, Maria Sharapova and Danica Patrick have in common?

Second place ... so says "Criminal Minds" star Shemar Moore who says he's got a new girlfriend who's the #1 HOTTEST chick in pro sports.

So who's the mystery woman who was out with the notorious ladies man in L.A. this week?

Meet Shawna Gordon ... a pro soccer player with Sky Blue FC (a NJ-based team that competes in the National Women's Soccer League).

"If she stands up and turns around you might just faint," Moore told us ... before advising us to "look her up."

We did. Nice work bro.