Alex Rodriguez proved he's a baller on the baseball diamond and the hardwood ... 'cause he tossed up a shot Sunday from halfcourt and made it -- helping out one lucky student in the process.
The former Yankees third baseman was in attendance to watch Army take on Bucknell University Saturday afternoon in basketball ... and, during halftime he was invited to take a huge shot from the middle of the floor.
Check out the vid ... A-Rod -- clad in a bright orange Bucknell t-shirt -- tosses the ball up, hits the backboard and the ball goes straight through the hoop.