Junior middleweight Andre Berto, who fought in the 2004 Olympics under the Haitian flag, improved to 6-0 by stopping Anthony Little in the sixth round at the Manhattan Center in New York City on Thursday. For the first two rounds, Berto's shots looked powerful but had little effect. Finally in round three, Berto's heavy blows began to take their toll on Little, now 4-2. Little's head snapped back a few times, but when he didn't go down, Berto seemed to lack a Plan B, something not uncommon for yound professionals. But generally it was a good performance for Berto, and he landed enough hard punches to convince the referee to stop the bout in the sixth. On the same DiBella Entertainment show, junior welterweight Edgar Santana won an eight-round decision against tough Derrick Moon by scores of 80-72, 79-73 and 78-74; cruiserweight Ehinomen Ehikhamenor, 11-0, decisioned John Douglas, 5-10-3, over six rounds; Gary Stark, a Staten Island super bantamweight, improved to 12-0 with a wide unanimous decision over Juan Carlos Santiago, 8-6-1; super middleweight Ray Darden, 9-10, upset Aneudi Santos, 12-3, by six-round split-decision; and Peter Quillin turned pro with a first-round knockout of Anthony Hunter.