Here's some others:
Double Knockouts:
Detroit, Michigan, February 12, 1941-Sammy Secreet,
Pittsburgh, and Pat Carroll, Detroit, scored simultaneous
knockouts. Referee Rosen called it a double knockout, but
Boxing Commission called it "no-contest"-seventh round.
Kansas City, Mo.-Pat Kissinger and Al Dorlac bumped heads
and were knocked out at the same time. Referee Harry Corbett
called it a double knockout in the third.
Salt Lake City, Utah, February 14, 1939 - Pete Giacoma and
D-ick Diamond hit each other for a double knockout.
New Orleans La.- March 3, 1893-George Dawson vs. Ed Greaney,
both crossed rights to the chin in the 3rd round at Olympic
A. C.
San Francisco, Cal.-1899-Sam Fitzpatrick vs. Paddy Meehan
welterweights. At the California Athletic Club, fourth
round, referee called it no contest.
April 23, 1910-At the Brooklyn Beach A. C., Young Dutch and
Young Betts landed simultaneously on the jaw and both
dropped to the canvas. They were carried to their corners,
helpless after the referee had counted both out.
April 17 1896-At Chicago, Ed Hagne and George Skulky fought
in a private battle for a $1,500 purse. In the sixteenth
round each crashed a left to the jaw and went down. The
referee counted both out.
Sept., 1922-At Grand Junction, Colo., Jack Bowens and
Whitney Hutton connected simultaneously and went down. The
referee counted both out.
Jan. 14, 1951-At Osaka, Japan, featherweight boxers Kiyoaki
Nakanishi and Nobow Miyamoto knocked each other out in the
fourth round. They exchanged blows, fell to the canvas
and were counted out. The referee called it a draw.
Sept. 29, 1959-When both fighters were unable to continue
after the fifth round due to severe lacerations the bout
between Al Milone and Eddie Woods, at Philadelphia, was
stopped and ruled a double technical knockout.
April 1, 1909-At Fainnont A. C., New York City, Sailor Burke
dropped Willie Lewis in first round; Lewis dropped Burke in
second round and in the third, both went to the canvas on a
double knockdown but the bell sounded before Billy Joh, the
referee counted either out. Then in the sixth round, Burke
was knocked out.
Oct., 1942 - At Bridgeport, Conn. Tony Iaccavone, Stamford
light heavyweight and George Thompson landed at the same
time on each other's chin and both went down. Thompson got
to his feet while the referee was counting, but Iaccavone
was counted out.
On Sept. 21 1965-Tony Lythgoe vs. Stan Simpson, St, George
Leagues Club, Kogarah, N.S, Wales, both boxers fell out of
the ring in the second round and were counted out. Referee
Mitchell called the bout a draw.
Double Knockdowns
May 20, 1969-Sonny Floyd, Philadelphia vs. Manny Frietas,
Lowell Mass. Both connected with rights in the second round
that resulted in a double knockdown. Frietas got up at the
count of three and Floyd at the count of rune, Floyd won the
bout when the referee stopped it due to a severe cut over
the eye sustained by Frietas. The bout was held in
Hyattsville, Maryland.
In Zagreb, Yugoslavia, December 20, 1968, Yvan Prebeg,
Yugoslavia, and Blas Di Vanbode, engaged in a heavyweight
bout of 10 rounds. In the fourth they were dropped
simultaneously and the referee counted them out. Then he
ordered them to resume boxing. The bout went the full ten
and was called a draw.
June 22 1970 - Middleweights Bob Cassidy and Sonny Floyd
each dropped the other in the first round. Cassidy won by
kayo in 2:37 of round one. Bout held in Freeport, L.I.
July 15, 1970 - Amado Vasquez and Hill Chambers scored a
double knockdown in the fifth round. Vasquez won a ten round
duke. Las Vegas.
Oct. 28, 1978 - Angel Espada, Puerto Rico and Kevi Moises,
Philadelphia both banged heads and were flat on their backs.
The referee counted and Espada managed to get up and was
declared the winner via kayo. Bout took place in San Juan,
P.R.