2 smokin' hot models flashed their boobs during last night's World Series game ... and now MLB has BANNED the women!!
The incident -- caught by TV cameras -- went down in the 7th inning of Game 5 of the W.S. between the Nationals and Astros in Washington D.C.
Julia Rose and Lauren Summer -- who have 2.8 and 1.5 million followers on Instagram, respectively -- were seen lifting their shirts up as Gerrit Cole prepared to throw a pitch.
The game was briefly held up ... and security apprehended Rose and Summer and escorted them from their seats.