Muhammad Ali: 'Ten Count' Record 32-5 (20 KO) vs Ranked Top Ten Opponents -(Ring Magazine)...............Ali Ranked 07/20/62.....Alejandro Lavorante ...# 10 .........KO 5 ..........# 9 11/15/62.....Archie Moore ..............# 5 ..........KO 4 ..........# 7 03/13/63.....Doug Jones ................# 3 ..........W 10 ..........# 2 06/18/63.....Henry Cooper .............# 7 ..........KO 6 ..........# 2 02/25/64.....Sonny Liston ...............WHC ........KO 6 ..........# 1 05/25/65.....Sonny Liston ...............# 1...........KO 1 .........WHC 11/22/65.....Floyd Patterson ............# 1 .........KO 12 ........WHC 03/29/66.....George Chuvalo ...........# 9 ..........W 15 .........WHC 05/21/66.....Henry Cooper ..............# 4 ..........KO 6 ..........WHC 09/10/66.....Karl Mildenberger .........# 3 ..........KO 12 ........WHC 11/14/66.....Cleveland Williams .......# 3 ...........KO 3 .........WHC 02/06/67.....Ernie Terrell ................# 1 (WBA)...W 15.........WHC 03/22/67.....Zora Folley ..................# 2............KO 7 .........WHC (EXILED)-Relinquished the Heavyweight Championship Feb. 15, 1970 10/26/70.....Jerry Quarry ...............# 1 ...........KO 3 ........Unranked 12/07/70.....Oscar Bonavena...........# 3 ...........KO 15 ..........# 1 03/08/71 ....Joe Frazier .................WHC ..........L 15 ............# 1 07/26/71.....Jimmy Ellis .................# 7 ...........KO 12 ..........# 1 04/01/72 ....Mac Foster ..................# 6............W 15 ...........# 1 06/27/72 ....Jerry Quarry ...............# 2 ...........KO 7 .............#1 11/22/65.....Floyd Patterson ............# 3 ..........KO 7 ............# 1 11/21/72 ....Bob Foster ..................LHW .........KO 8 ............ # 1 02/14/73 ....Joe Bugner .................# 9 ...........W 12 .......... .# 1 03/31/73 ....Ken Norton .................# 9 ...........L 12 .............# 1 09/10/73 ....Ken Norton .................# 2 ...........W 12 ............# 3 01/28/74.....Joe Frazier ..................# 2 ...........W 12 ............# 1 SECOND: WORLD CHAMPIONSHIP REIGN 10/30/74.....George Foreman ..........WHC ..........KO 8 ...........# 1 03/24/75.....Chuck Wepner ..............# 9 ...........KO 15 .........WHC 05/16/75.....Ron Lyle ......................# 8 ...........KO 11 .........WHC 06/30/75.....Joe Bugner ...................# 4 ...........W 15 .........,WHC 10/01/75.....Joe Frazier ...................# 2 ...........KO 14 .........WHC 04/30/76.....Jimmy Young ................# 3 ...........W 15 ..........WHC 09/28/76.....Ken Norton ...................# 2 ...........W 15 ..........WHC 09/29/77.....Earnie Shavers .............# 5 ...........W 15 ...........WHC 02/15/78.....Leon Spinks .................# 9 ............L 15 ...........WHC THIRD: WORLD CHAMPIONSHIP REIGN 09/15/78.....Leon Spinks .................WHC ...........W 15 ..........# 1 (Relinquished the Belt due to Retirement) 10/02/80.....Larry Holmes ................WHC (WBC)..KO by 10 ....# 5 12/11/81.....Trevor Berbick ..............# 7 ............L 10 ..........Unranked
George Chuvalo was never knocked off of his feet, but you are right, Joe Frazier did stop him by TKO.
I just revisited the fight on YouTube. Chuvalo was severely cut over his eye...the cut went to the bone and later required surgery. He also had a gash on his head. So yes it was a TKO; Chuvalo was hurt but didn't go down.
Ron Lyle went from a high tier # 3 to # 8 because he had just been upset by Jimmy Young in Honolulu. Ali gave him his shot anyway.
Styles make fights...... Frazier gave Ali hell for almost 40 total rds. Frazier was annihilated by Foreman in 2rds Ali stops Foreman in 8rds.