By Keith Idec

NEW YORK – It took six-plus rounds Saturday night, but Sergey Lipinets’ vaunted power eventually affected Clarence Booth.

Lipinets, the powerful prospect from Kazakhstan, floored Booth with a straight right hand with just over two minutes remaining in the seventh round of their scheduled eight-round junior welterweight fight on the Danny Garcia-Keith Thurman undercard at Barclays Center in Brooklyn. The flush punch landed to the middle of Booth’s face and knocked him into the ropes, then to the seat of his trunks.

Booth got up, but Lipinets swarmed him in a neutral corner and unloaded a barrage of power punches to Booth’s body and head. Booth blocked some of the punches, but referee Gary Rosato still stopped the fight at 1:33 of the seventh round.

Booth, still standing and alert, disputed the stoppage, the first such loss of a pro career that began in June 2011.

The 27-year-old Lipinets, a former kickboxer, improved to 12-0 and recorded his 10th knockout.

The 29-year-old Booth, of St. Petersburg, Florida, dropped to 14-3 (7 KOs). His previous losses came by unanimous decision in an eight-rounder to Alex Saucedo (23-0, 14 KOs) and in a four-rounder to Cletus Seldin in Booth’s third pro fight.

Booth had been competitive prior to the stoppage, but wasn’t able to hurt Lipinets.

In the following fight, 2016 Olympian Richardson Hitchins made an impressive pro debut by scoring a first-round technical knockout against Mexico’s Mario Perez (1-1) in a welterweight fight scheduled for four rounds. Hitchins, a Brooklyn native, represented Haiti, where his parents were born, in the 2016 Summer Olympics in Rio de Janeiro.

Keith Idec is a senior writer/columnist for BoxingScene.com. He can be reached on Twitter @Idecboxing.