Mansour wins in 24 seconds
Amir Mansour confirmed his growing reputation as a dangerous heavyweight when he knocked out Dominique Alexander on Saturday night.
The fight in Dover, Delaware, was over after 24 seconds.
Mansour is undefeated after 17 fights and his 13th knockout victory indicated that he should be matched against better opponents than Alexander, whose record stands at 23-16-1, with 11 knockouts.
Taking a leaf from the Mike Tyson style book, Mansour hit Alexander with two booming rights to the body before switching to the head and finishing the bout.
Another heavyweight, Franklin Lawrence, pleased the spectators when he stopped Mark Brown in the second round. Ranked 15th by the WBC, Lawrence improved his record to 19-2-2, with 14 knockouts. Brown dropped to 15-5; 7.
Edgar Santana (27-4; 18) dropped Eddie Soto (12-6; 4) twice before stopping him in the second round of a welterweight bout.
In New York, Demetrius Andrade, a former Olympian, beat Freddy Hernandez on points over ten rounds in a junior middleweight bout – 100-89 on each of the cards.
Andrade, now ranked No 3 by the IBF, is undefeated after 19 bouts, of which he won 13 by knockout. Hernandez dropped to 30-4; 20.
Welterweight Emmanuel Taylor (16-1; 11) stopped Raymond Serrano (18-2; 8) in the sixth round.
Former WBA junior middleweight champion Yuri Foreman had his first fight in nearly two years and beat Brandon Baue on points over six rounds; also in New York. The scores were 60-54 on each of the cards.
Foreman improved to 29-2; 8 and Baue dropped to 12-10; 10.
Super-middleweight Lamar Russ moved to 12-0; 7 when he beat Jose Medina (17-12-1; 7) on points over eight rounds and featherweight Luis Rosa (12-0; 6) also won over eight rounds when he beat Derrick Wilson (9-4-2; 3).
In Verona, New York, Brian Vera produced an upset when he stopped former WBO junior middleweight champion Serhiy Dzinziruk in the tenth round of a middleweight bout.
Vera improved his record to 22-6, with 13 knockouts. Dzinziruk, who was down twice in the first round, fell to 37-2-1; 24.
In Boston, Danny O’Connor beat Derek Silveira on a majority decision over ten rounds in a welterweight bout – 100-89 and 97-93 against and 95-95. O'Connor now stands at 20-1; 7 and Silveira at 8-1; 4.
In Hinckley, Minnesota, Cerresso Fort (15-0-1; 11) stopped Andy Kolle (25-4; 18) in the fifth round of a middleweight bout.
In Morelia, Mexico, Jorge Paez Jr knocked out Francisco Fuentes in the ninth round of a welterweight bout to take his record to 34-4-1; 20. Fuentes, who dropped to 16-3; 13, was down twice in the sixth round.
Super-flyweight Felipe Orucuta (27-1; 23) knocked out Fernando Lumacad (27-6-3; 12 ) in the first round.
In Santa Ynez, California, Roman Morales (14-0; 7) stopped Jose Iniguez (6-15; 1) in the fifth round of a super-bantamweight bout.