A Houston Astros fan ran onto the field during the team's playoff game against the Yankees on Thursday night and hugged Jose Altuve ... and TMZ Sports has learned he was ultimately arrested over the stunt.
The man hopped Minute Maid Park railing during the ninth inning of Game 2 of the ALCS ... and quickly made a beeline for Houston's biggest star.
The guy -- later ID'ed as 27-year-old Jose Alvarado -- dodged security long enough to actually get to Altuve ... and then he planted a big hug on the Astros second baseman.