Philadelphia-born super middleweight prospect Jesse Hart scored two knockdowns on his way to scoring at knockout at the 1:33 mark against Florida’s Marlon Farr at Radio City Music Hall on Saturday night.

Hart-Farr took place on the undercard of an HBO-televised junior featherweight clash between RING and WBO junior featherweight champion Nonito Donaire and WBA counterpart Guillermo Rigondeaux.

Hart floored Farr with a right hand after which the eventual loser scarcely rose at referee Arthur Mercante Jr.’s count of eight. Once on his feet, however, Farr was nailed with a barrage of blows, the last, another right hand that knocked him through the ropes as Mercante stepped in to protect him.

Click here for the video of Hart’s knockout of Farr.

A 6-foot-2, 23-year-old, Hart rose to 7-0 with five knockouts, while Farr slipped to 2-3. Farr initially weighed at 171 pounds, but was given an hour to lose what amounted to eight ounces to make the contracted 170-pound limit.

Hart is trained by his father, Eugene “Cyclone” Hart, a premier middleweight out of Philadelphia through the 1970s.

Also on the undercard, junior middleweight prospect Glen Tapia (18-0, 10 KOs), of Passaic, N.J., out-slugged Puerto Rican opponent Joseph de los Santos (13-12-3, 6 KOs) for an eight-round unanimous decision. Tapia was coming off a second-round stoppage of Ayi Bruce at Madison Square Garden in January.

In the night’s first bout, Detroit lightweight Erik DeLeon (3-0, 1 KO) won a four-round unanimou decision over Diamond Baier (2-5-1, 0 KOs), of Phoenix, AZ.

Next up was Canadian welterweight prosepct Mikael Zewski (19-0, 15 KOs) dropping New York’s Daniel Sostre (11-9-1, 4 KOs) twice in the second and final round, where referee Arthur Mercante reached the 10-count at 49 seconds for the knockout.

In the third bout, junior middleweight Tyler Caning (2-1, 0 KOs) of Lander, Wy., pulled a mild upset over Dario Soccia (2-1, 0 KOs) by four-round split-decision.

Photo by Chris Farina, Top Rank

Lem Satterfield can be reached at [email protected]