Andy Ruiz sprang into action after seeing an elderly man struggling to push his stalled car over the weekend -- hopping out of his ride to lend a heavyweight hand!!!
The boxing superstar was cruising with his childhood buddy, Alexander Martinez, in his pricey Lamborghini Urus when he spotted a guy struggling to move his Land Rover in the street.
That's when Martinez says Ruiz jumped into action ... telling The Sun, "Andy noticed he was trying to push the car himself and we pulled over and he got out with Anthony Garnica, a fellow fighter.