Johnny Manziel Celebrates 21st Birthday in Vegas

Texas A&M Aggies star quarterback Johnny Manziel celebrated his 21^st birthday this weekend in style, frolicking around Las Vegas.

TMZ.com stumbled upon the College Football standout playing blackjack at the Hard Rock Casino.   

From TMZ.com:

Sources in the casino tell us the guys played for roughly an hour -- from the looks of things, Johnny was doing his gambling with a short stack of the standard $5 red chips.

We're told Manziel had himself some chew at the table ... and was often seen spitting the tobacco into an empty beer bottle (see the pic below).

Unclear if he won or lost any cash -- but one thing's for sure ... the guys all seemed like they were having a blast.

- Don Shapiro, Gambling911.com