In yet another display of freakish athleticism, here's New York Giants superstar wide receiver Odell Beckham Jr. dunking like a boss ... while wearing a backpack.
The NFL star -- who was just named offensive Rookie of the Year -- put on an impromptu slam dunk clinic on an outdoor court earlier Tuesday ... and gave a shoutout to LeBron James while he was at it.
Fun Fact -- Beckham Jr. says soccer is his 2nd sport ... not hoops.
Just sayin' ...
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