John Ruiz (44-9-1, 30) was born in Chelsea, Massachusetts, U.S. on January 4, 1972. At the age of 20 years on August 20, 1992, he made his professional boxing debut against Kevin Parker, winning the fight via 4-round unanimous decision.
On his 40th career fight at 28 years old, John Ruiz got a shot at the WBA heavyweight titles against Evander Holyfield on August 12, 2000 but lost the fight via 12-round unanimous decision.
He became a heavyweight world champion (WBA) on March 3, 2001 at the age of 29 years old, on his 41st career fight, after defeating Evander Holyfield via 12-round unanimous decision.
Ruiz' last fight was a heavyweight world-title fight against David Haye for Haye's WBA title on April 3, 2010. He lost the fight via 9th-round TKO. He retired from the sport of boxing following this loss.
Some of John Ruiz' best fights have been against Andrew Golota, Evander Holyfield, Hasim Rahman, Jameel McCline, Tony Tucker, Fres Oquendo and Roy Jones Jr.
Ruiz has 9 losses on his boxing record.
| # | Date | Opponent | Weight | Round | Method | Result |
|---|---|---|---|---|---|---|
55  | Apr 3, 2010 38 years, 2 months 44-9-1 (30) | 29 years, 5 months 23-1 (21) | HW | 9 | TKO | LOSS For WBA |
54 | Nov 7, 2009 37 years, 10 months 44-8-1 (30) | Adnan Serin | HW | 7 | TKO | WIN |
53  | Aug 30, 2008 36 years, 7 months 43-8-1 (29) | 35 years 48-1 (34) | HW | 12 | UD | LOSS For WBA Vacant |
52  | Mar 8, 2008 36 years, 2 months 43-7-1 (29) | 37 years, 9 months 38-8-3 (23) | HW | 12 | UD | WIN |
51 | Oct 13, 2007 35 years, 9 months 42-7-1 (29) | Otis Tisdale | HW | 2 | TKO | WIN |
50  | Nov 18, 2006 34 years, 10 months 41-7-1 (28) | 28 years 21-0-1 (17) | HW | 12 | SD | LOSS |
49 | Dec 17, 2005 33 years, 11 months 41-6-1 (28) | 32 years, 3 months 42-0 (31) | HW | 12 | MD | LOSS Lost WBA |
48  | Apr 30, 2005 33 years, 3 months 41-5-1 (28) | 36 years, 8 months 68-4-2 (43) | HW | 12 | UD | NC Defended WBA |
47  | Nov 13, 2004 32 years, 10 months 41-5-1 (28) | 36 years, 10 months 38-4-1 (31) | HW | 12 | UD | WIN Defended WBA |
46  | Apr 17, 2004 32 years, 3 months 40-5-1 (28) | 31 years 24-2 (15) | HW | 11 | TKO | WIN Defended WBA |
45  | Dec 13, 2003 31 years, 11 months 39-5-1 (27) | 31 years, 1 months 35-4-1 (29) | HW | 12 | UD | WIN Won WBA Interim |
44  | Mar 1, 2003 31 years, 1 months 38-5-1 (27) | 34 years, 1 months 47-1 (38) | HW | 12 | UD | LOSS Lost WBA |
43  | Jul 27, 2002 30 years, 6 months 38-4-1 (27) | 30 years 32-0-1 (23) | HW | 10 | DQ | WIN Defended WBA |
42  | Dec 15, 2001 29 years, 11 months 37-4-1 (27) | 39 years, 1 months 37-5-1 (25) | HW | 12 | SD | DRAW Defended WBA |
41 | Mar 3, 2001 29 years, 1 months 37-4 (27) | 38 years, 4 months 37-4-1 (25) | HW | 12 | UD | WIN Won WBA |
40 | Aug 12, 2000 28 years, 7 months 36-4 (27) | 37 years, 9 months 36-4-1 (25) | HW | 12 | UD | LOSS For WBA Vacant |
39 | Dec 11, 1999 27 years, 11 months 36-3 (27) | Thomas Williams | HW | 2 | TKO | WIN |
38 | Jun 12, 1999 27 years, 5 months 35-3 (26) | Fernely Feliz | HW | 7 | TKO | WIN |
37 | Mar 13, 1999 27 years, 2 months 34-3 (25) | Mario Cawley | HW | 4 | TKO | WIN |
36 | Sep 19, 1998 26 years, 8 months 33-3 (24) | Jerry Ballard | HW | 4 | TKO | WIN |
35  | Jan 31, 1998 26 years 32-3 (23) | 39 years, 1 months 56-6 (46) | HW | 11 | TKO | WIN |
34 | Jun 17, 1997 25 years, 5 months 31-3 (22) | Ray Anis | HW | 1 | TKO | WIN |
33 | Jan 14, 1997 25 years 30-3 (21) | Jimmy Thunder | HW | 12 | SD | WIN |
32 | Nov 26, 1996 24 years, 10 months 29-3 (21) | Yuriy Yelistratov | HW | 3 | TKO | WIN |
31 | Oct 25, 1996 24 years, 9 months 28-3 (20) | Nathaniel Fitch | HW | 3 | TKO | WIN |
30 | Jul 18, 1996 24 years, 6 months 27-3 (19) | Greg Pickrom | HW | 1 | TKO | WIN |
29 | Jun 6, 1996 24 years, 5 months 26-3 (18) | Doug Davis | HW | 6 | TKO | WIN |
28  | Mar 15, 1996 24 years, 2 months 25-3 (17) | 23 years, 3 months 22-0 (18) | HW | 1 | KO | LOSS |
27 | Oct 7, 1995 23 years, 9 months 25-2 (17) | Steve Pannell | HW | 4 | TKO | WIN |
26 | Aug 24, 1995 23 years, 7 months 24-2 (16) | Willie Jackson | HW | 1 | KO | WIN |
25 | Jun 16, 1995 23 years, 5 months 23-2 (15) | Derrick Roddy | HW | 2 | KO | WIN |
24 | May 17, 1995 23 years, 4 months 22-2 (14) | Michael Murray | HW | 4 | TKO | WIN |
23 | Mar 30, 1995 23 years, 2 months 21-2 (13) | Jack Basting | HW | 1 | TKO | WIN |
22 | Feb 4, 1995 23 years, 1 months 20-2 (12) | Boris Powell | HW | 10 | UD | WIN |
21 | Oct 1, 1994 22 years, 8 months 19-2 (12) | Rick Sullivan | HW | 2 | KO | WIN |
20 | Aug 4, 1994 22 years, 7 months 18-2 (11) | Danell Nicholson | HW | 12 | SD | LOSS |
19 | Jun 25, 1994 22 years, 5 months 18-1 (11) | Muhammad Askai | 2 | TKO | WIN | |
18  | May 25, 1994 22 years, 4 months 17-1 (10) | 29 years, 5 months 6-0 (3) | 4 | KO | WIN | |
17 | Nov 27, 1993 21 years, 10 months 16-1 (9) | Carl Williams | 6 | PTS | WIN | |
16 | Nov 3, 1993 21 years, 9 months 15-1 (9) | Cordwell Hylton | 6 | PTS | WIN | |
15 | Aug 12, 1993 21 years, 7 months 14-1 (9) | Sergei Kobozev | 10 | SD | LOSS | |
14 | Jun 25, 1993 21 years, 5 months 14-0 (9) | Exum Speight | 8 | UD | WIN | |
13 | Apr 30, 1993 21 years, 3 months 13-0 (9) | George Chambers | 1 | KO | WIN | |
12 | Apr 16, 1993 21 years, 3 months 12-0 (8) | Mark Sonnier | 1 | TKO | WIN | |
11 | Apr 3, 1993 21 years, 2 months 11-0 (7) | Juan Quintana | 6 | PTS | WIN | |
10 | Mar 20, 1993 21 years, 2 months 10-0 (7) | Lorenzo Poole | 1 | KO | WIN | |
9 | Mar 5, 1993 21 years, 2 months 9-0 (6) | Derrick Jones | 1 | TKO | WIN | |
8 | Feb 20, 1993 21 years, 1 months 8-0 (5) | Phil Prince | 1 | KO | WIN | |
7 | Jan 30, 1993 21 years 7-0 (4) | Miguel Rosa | 2 | TKO | WIN | |
6 | Jan 16, 1993 21 years 6-0 (3) | John Basil Jackson | 6 | PTS | WIN | |
5 | Dec 10, 1992 20 years, 11 months 5-0 (3) | Jesus Rohena | 1 | TKO | WIN | |
4 | Nov 13, 1992 20 years, 10 months 4-0 (2) | John Basil Jackson | 6 | PTS | WIN | |
3 | Nov 3, 1992 20 years, 9 months 3-0 (2) | Barry Kirton | 2 | TKO | WIN | |
2 | Sep 12, 1992 20 years, 8 months 2-0 (1) | Mike Vasser | 1 | KO | WIN | |
1 | Aug 20, 1992 20 years, 7 months 1-0 (0) | Kevin Parker | 4 | UD | WIN |
