Cleveland Cavs — Launch Internal Investigation … Why Was Gatorade Poured Into Powerade Bottle?

Exclusive Details

The Cleveland Cavaliers tell TMZ Sports … they have NO IDEA why a ball boy was serving players Gatorade masked in a Powerade pot last night — but they’re gunning to find out why. 

Twitter EXPLODED last night during the Knicks-Cavaliers game when a TV camera trapped a Cavs ball boy making the switch behind the Knicks bench. 

Now the Cavs — who…