MLB Star Geovany Soto -- I'm EMBARRASSED Over Marijuana Arrest

Texas Rangers catcher Geovany Soto is apologizing to teammates, fans and his bosses ... saying he's "embarrassed" after being arrested for weed possession last night.

The 31-year-old former NL Rookie of the Year was pulled over for speeding in Grapevine, TX around 10PM Wednesday night ... and during the stop, cops say they found a small amount of pot.

Soto was ultimately arrested for marijuana possession -- and was hauled to a nearby station where he was booked and posed for a mug shot. He was released on $500 bail.

Moments ago, Soto issued a statement saying, "I was stopped by Grapevine Police on Wednesday night. I am embarrassed and would like to apologize to my family, the Rangers organization, and our fans that I was taken in on this charge."