| Brian Gassaway | |
| Other Names: | Mandingo |
| Birth Date: | 7 August 1972 |
| Birth Place: | Urbana, Ohio, U.S. |
| Death Place: | Chicago, Illinois, U.S. |
| Weight: | 170lb |
| Weight Class: | Heavyweight Middleweight Light Heavyweight Welterweight Lightweight |
| Stance: | Orthodox |
| Fighting Out Of: | Chicago, Illinois, United States |
| Mma Kowin: | 6 |
| Mma Subwin: | 11 |
| Mma Decwin: | 10 |
| Mma Koloss: | 1 |
| Mma Subloss: | 11 |
| Mma Decloss: | 7 |
| Mma Draw: | 2 |
| Mma Nc: | 1 |
| Sherdog: | 886 |
Brian Gassaway (August 7, 1972 – October 17, 2021) was an American mixed martial artist who last competed in the Welterweight division. A professional competitor from 1996 until 2010, he competed for the UFC, Bellator, the WEC, King of the Cage, Shooto, and Pancrase.[1]
__TOC__
|-| Loss| align=center| | Shungo Oyama| Technical Submission (inverted triangle choke) | MC: Martial Combat 10 | | align=center| 1| align=center| 1:50| Sentosa, Singapore| |-| Win| align=center| 29–19–2 (1)| Kevin Knabjian| Decision (unanimous)| Bellator 25| | align=center| 3| align=center| 5:00| Chicago, Illinois, United States| |-| Loss| align=center| 28–19–2 (1)| Mike Pyle| Submission (armbar)| SuperFights MMA: Night of Combat 2| | align=center| 1| align=center| 4:21| Las Vegas, Nevada, United States| |-| Loss| align=center| 28–18–2 (1)| Forrest Petz| Decision (unanimous)| Adrenaline MMA: Guida vs. Russow| | align=center| 3| align=center| 5:00| Chicago, Illinois, United States| |-| Win| align=center| 28–17–2 (1)| Jose Landi-Jons| TKO (broken leg)| TKO 32: Ultimatum| | align=center| 2| align=center| 0:50| Montreal, Quebec, Canada| |-| Win| align=center| 27–17–2 (1)| Levi Avera| Submission (armbar)| ICS: Cage Rage| | align=center| 1| align=center| 4:55| Oklahoma, United States| |-| Win| align=center| 26–17–2 (1)| Cedric Marks| Decision (majority)| CCCF: Riverwind Rumble 2| | align=center| 5| align=center| 3:00| Oklahoma, United States| |-| Loss| align=center| 25–17–2 (1)| Dereck Keasley| Decision (unanimous)| KOTC: Damage Control| | align=center| 2| align=center| 5:00| Chicago, Illinois, United States| |-| Loss| align=center| 25–16–2 (1)| John Alessio| Submission (rear naked choke)| WEC 25: Las Vegas| | align=center| 1| align=center| 4:50| Nevada, United States| |-| Loss| align=center| 25–15–2 (1)| Donnie Liles| Submission (rear naked choke)| XFO 13: Operation Beatdown| | align=center| 1| align=center| 3:58| Hoffman Estates, Illinois, United States| |-| Win| align=center| 25–14–2 (1)| Sam Jackson| Submission (strikes)| XFO 12: Outdoor War| | align=center| 1| align=center| 3:54| Illinois, United States| |-| Win| align=center| 24–14–2 (1)| Jamie Toney| Decision (unanimous)| EC 68: Extreme Challenge 68| | align=center| 3| align=center| 5:00| Hayward, Wisconsin, United States| |-| Loss| align=center| 23–14–2 (1)| Joey Clark| Decision (unanimous)| KOTC: Redemption on the River| | align=center| 3| align=center| 5:00| Illinois, United States| Middleweight bout.|-| Loss| align=center| 23–13–2 (1)| Diego Sanchez| TKO (submission to punches)| UFC 54: Boiling Point| | align=center| 2| align=center| 1:56| Nevada, United States| |-| Win| align=center| 23–12–2 (1)| Gia Chirragishvili| Submission (rear-naked choke)| Shido: MMA| | align=center| 1| align=center| 3:10| Georgia, United States| |-| Win| align=center| 22–12–2 (1)| Trevor Garrett| Submission (rear-naked choke)| SB 40: SuperBrawl 40| | align=center| 1| align=center| 2:36| Indiana, United States| |-| NC| align=center| 21–12–2 (1)| Ross Ebañez| No Contest| WEC 14: Vengeance| | align=center| N/A| | California, United States| |-| Loss| align=center| 21–12–2| Nick Thompson| Decision| Combat: Do Fighting Challenge 2| | align=center| N/A| | Illinois, United States| |-| Win| align=center| 21–11–2| Paul Jenkins| Decision| CW: Cage Wars| | align=center| N/A| | Ireland| |-| Draw| align=center| 20–11–2| Gideon Ray| Draw| Shooto: Midwest Fighting| | align=center| 3| align=center| 5:00| Indiana, United States| |-| Win| align=center| 20–11–1| Stephane Jamet| align=center| N/A| Shido: Fists of Fury 2| | align=center| N/A| | Germany| |-| Loss| align=center| 19–11–1| Tetsuji Kato| Decision (unanimous)| Shooto: 3/18 in Korakuen Hall| | align=center| 3| align=center| 5:00| Tokyo, Japan|Return to Welterweight.|-| Win| align=center| 19–10–1| Jason Rigsby| Decision (unanimous decision)| IC 5: Tribulation| | align=center| 3| align=center| 5:00| Indiana, United States|Middleweight bout.[2] |-| Loss| align=center| 18–10–1| Yuki Kondo| Submission (toe hold)| Pancrase: Proof 2| | align=center| 1| align=center| 1:45| Osaka, Japan| |-| Loss| align=center| 18–9–1| Ikuhisa Minowa| Submission (toe hold)| Pancrase: 2000 Anniversary Show| | align=center| 1| align=center| 5:00| Yokohama, Japan| |-| Win| align=center| 18–8–1| John Chrisostomo| Decision (unanimous)| Pancrase - Trans 5| | align=center| 1| align=center| 10:00| Tokyo, Japan| |-| Win| align=center| 17–8–1| Yuji Hisamatsu| Decision (majority)| Pancrase: Trans 5| | align=center| 2| align=center| 3:00| Tokyo, Japan| |-| Loss| align=center| 16–8–1| Adrian Serrano| Decision (unanimous)| EC 31: Extreme Challenge 31| | align=center| 3| align=center| 5:00| Wisconsin, United States| |-| Win| align=center| 16–7–1| Henry Matamoros| TKO| TC: Total Combat 1| | align=center| N/A| | Illinois, United States| |-| Win| align=center| 15–7–1| Dan Griffen| Submission| TC: Total Combat 1| | align=center| N/A| | Illinois, United States| |-| Win| align=center| 14–7–1| Dennis Reed| Submission (armbar)| EC 26: Extreme Challenge 26| | align=center| 1| align=center| 3:30| Illinois, United States| |-| Win| align=center| 13–7–1| Joshua Taibl| Submission (rear-naked choke)| CC 3: Cage Combat 3| | align=center| 1| align=center| 2:18| Ohio, United States| |-| Win| align=center| 12–7–1| John Renken| TKO| CC 3: Cage Combat 3| | align=center| 1| align=center| 7:38| Ohio, United States| |-| Win| align=center| 11–7–1| Travis Fulton| Decision| CC 3: Cage Combat 3| | align=center| 1| align=center| 15:00| Ohio, United States| |-| Draw| align=center| 10–7–1| Kevin Cook| Draw| WEF 6: World Extreme Fighting 6| | align=center| N/A| | Florida, United States| |-| Win| align=center| 10–7| John Chrisostomo| TKO (cut)| SB 12: SuperBrawl 12| | align=center| 2| align=center| 0:32| Hawaii, United States| |-| Win| align=center| 9–7| Adam Palmer| TKO| EB 4: Extreme Boxing 4| | align=center| 1| align=center| 5:51| Iowa, United States| Light Heavyweight debut.|-| Win| align=center| 8–7| Joe Slick| Decision| EB 4: Extreme Boxing 4| | align=center| 1| align=center| 15:00| Iowa, United States| |-| Win| align=center| 7–7| Mark Hughes| Decision (split)| JKD: Challenge 3| | align=center| 3| align=center| 5:00| Chicago, Illinois, United States| |-| Win| align=center| 6–7| Martin Wickline| Submission| WPC: Rage in the Cage| | align=center| N/A| | Indiana, United States| |-| Win| align=center| 5–7| Jeremy Morrison| Submission (armbar)| JKD: Challenge 1| | align=center| 1| align=center| 3:50| Illinois, United States| |-| Win| align=center| 4–7| Jason Nicholsen| Submission (armbar)| WPC: World Pankration Championships 2| | align=center| 1| | Texas, United States| |-| Loss| align=center| 3–7| Vernon White| Submission (ankle lock)| WPC: World Pankration Championships 1| | align=center| 1| align=center| 1:26| Texas, United States| |-| Loss| align=center| 3–6| Egidio da Costa| Submission (headlock)| International Vale Tudo Championship 2: A Question of Pride| | align=center| 1| align=center| 2:54| Brazil| |-| Loss| align=center| 3–5| Osami Shibuya| Submission| Pancrase: Alive 7| | align=center| 1| align=center| 8:47| Japan| |-| Loss| align=center| 3–4| Keiichiro Yamamiya| Decision (lost points)| Pancrase: Alive 1| | align=center| 1| align=center| 10:00| Tokyo, Japan| Return to Heavyweight.|-| Loss| align=center| 3–3| Jay R. Palmer| TKO (submission to punches)| SB 2: SuperBrawl 2| | align=center| 1| align=center| 4:05| Hawaii, United States| Lightweight debut.[3] |-| Loss| align=center| 3-2| Mike Sciortino| align=center| N/A| IFC 3: International Fighting Championship 3| | align=center| N/A| | Alabama, United States| |-| Win| align=center| 3–1| Loren Phillips| align=center| N/A| IFC 3: International Fighting Championship 3| | align=center| N/A| | Alabama, United States| Middleweight debut.|-| Loss| align=center| 2–1| Anthony Macias| Submission (kneebar)| IFC 2: Mayhem in Mississippi| | align=center| 1| align=center| 1:28| Mississippi, United States| |-| Win| align=center| 2–0| William Knorr| Submission (rear-naked choke)| IFC 2: Mayhem in Mississippi| | align=center| 1| align=center| 1:12| Mississippi, United States| |-| Win| align=center| 1–0| Michael Pacholik| Submission (rear-naked choke)| IFC 2: Mayhem in Mississippi| | align=center| 1| align=center| 1:38| Mississippi, United States|