Longest combined title reigns: before 2000
Most days as undisputed UFC champion, all reigns added together.
Reigns are derived from championship bouts. When a belt was vacated or stripped outside a title fight, the reign is shown ending at the next title fight in that division, so a few run long; a title awarded without a fight (José Aldo's in 2010, for one) starts at the champion's first UFC title fight.
7 fighters.
| # | Fighter | Days |
|---|---|---|
| 1 | Pat Miletich | 931 days |
| 2 | Frank Shamrock | 845 days |
| 3 | Randy Couture | 502 days |
| 4 | Kevin Randleman | 364 days |
| 5 | Bas Rutten | 196 days |
| 6 | Mark Coleman | 170 days |
| 7 | Maurice Smith | 147 days |