Perk points out Harden had no issues during the Western Conference Finals against the Spurs that same year ... 'cause there weren't any outside distractions.
"In San Antonio you didn't have a damn thing to do," Perkins added. "S***, we got to motherf***ing Miami, it was every-motherf***ing-thing to do. We couldn't get that motherf***ker to buy a bucket in that motherf***er."
The numbers don't lie -- Harden averaged 12.4 points in the 5-game series, after averaging 18.5 per game in the previous round against the Spurs.
Of course, the Heat went on to win it all in Game 5 -- securing LeBron's first championship .