Kevin Johnson dominated, dropped and stopped Devin Vargas in the sixth round of their scheduled 12-round battle of unbeaten U.S. heavyweight prospects in Atlantic City on Friday.

After dropping the first two rounds to the busier fighter, Johnson (22-0-1, 9 KOs) sent Vargas (17-1, 7 KOs) to a knee at the end of the third round, backing the 2004 Olympian up with a series of hooks and then hurting him with a couple of right crosses.

Vargas got up but he complained about pain in his right ear for the next three rounds. Johnson stalked Vargas in round four and scored another knockdown in the fifth round when he connected with two hooks that nailed the ear the 27-year-old former amateur star was favoring.

Johnson, a 29-year-old Atlanta native, punished a defenseless Vargas with accurate jabs and power shots in the sixth until referee Earl Morton halted the bout at 2:23 of the round, just after the Toledo, Ohio native's corner threw in the towel.

In the co-featured bout of the ESPN2 “Friday Night Fights” broadcast from Harrah's Marina Hotel Casino, lightweight prospect Jorge Teron (23-1, 15 KOs) avenged the only loss of his pro career by outpointing Aldo Valtierra (25-11, 13 KOs) over 10 rounds.

The Bronx, New York resident won by scores of 99-91, 97-93 and 96-94. Teron lost a majority decision to Valtierra in his previous fight, which took place last December.