I added some myself but mostly I just readed them today and yesterday. Some maybe be known others might be a surprise:
David haye put a beat down on audley harrison after harrisons first loss
Floyd Mayweather picking the "Chinese looking kid" (Kid Diamond that is) and getting dropped. Mark "Posion" Suarez dropped Floyd to the body in sparring. Floyd said it was low but Senior told nah that was a good punch.
McCall and Greg Page both gave Mike Tyson in his prime a hard time. Iron Mike was actually dropped by Page.
16 year old roy jones dropped prince charles williams with a body shot
muhammad ali beat the shit out of ingemar johannson when he was a rookie and ingo was training for the patterson rubber match. it was so embarassing his training pulled him out after/during the second round. ali said "it should be me fighting the champ!"
ortiz giving oscar a black eye and getting sent hom early
Tyson dropping Lennox Lewis inside 60 seconds when they were teenagers, then Lennox getting up and running away for the rest of the week he stayed at Catskills.
G-Man out-boxing Sugar Ray Leonard and Michael Moorer on the same night on his first-ever day at Kronk.
Evander Holyfield and Oliver McCall refusing to spar with G-Man because he hit too hard.
Eubank dropping Bomber Graham for the first time in his life (just before Bomber fought McCallum), but then Bomber getting up and Eubank not able to lay a glove on him for the rest of the session.
Reggie Johnson getting the better of Roy Jones in Pensacola in the fall of '91.
Naz getting beaten up by sparring partners before he fought Barrera.
Hatton dropped by a body shot from former British champ Pat Barrett when he was 15 (he'd never been so hurt from one punch and it gave him inspiration to introdude body punching into his style).
Sam Soliman claiming that Kostya Tszyu hit harder than middleweights
The word: Erislanda Lara beating on Ricky Hatton . (in prep for the manny fight...lara said he almost ko'd him in sparring )
Howard Eastman apparently sparked out Chris Eubank then had to pay for his cheek in further sessions.
kirk johnson used to beat the hell outta ike ibeabuchi in sparring down in texas
Tony Tubbs used to beat up on both of the Klitschko brothers in sparring
Fernando Vargas giving Ishe Smith a bit of a leathering in sparring
Apparently Lewis got kd against Ruiz and there was the 'leg sweep' against Jeremy Williams
Hope you enjoyed this , there are some remarkable facts and 'facts' in it.

One man gang