| Event Details | |
|---|---|
| Organization | Ultimate Fighting Championship |
| Name | UFC 17.5 - Ultimate Brazil |
| Date | October 16th, 1998 |
| Venue | Portuguesa Gymnasium |
| Location | Sao Paulo, Brazil |
| Fight #1 | |
|---|---|
| Welterweight Bout | |
  |
|
| Cesar Marcussi | Paulo Santos |
| Cesar Marcussi via TKO (Punches) | |
| Time Round 1 @ 9:55 |
Referee Fernando Yamasaki |
| Fight #2 | |
|---|---|
| Light Heavyweight Bout | |
|
|
| Tulio Palhares | Adriano Santos |
| Tulio Palhares via TKO (Punches) | |
| Time Round 1 @ 8:58 |
Referee Fernando Yamasaki |
| Fight #3 | |
|---|---|
| Light Heavyweight Bout | |
|
 |
| Ebenezer Fontes Braga | Jeremy Horn |
| Ebenezer Fontes Braga via Submission (Guillotine Choke) | |
| Time Round 1 @ 3:27 |
Referee John McCarthy |
| Fight #4 | |
|---|---|
| Heavyweight Bout | |
 |
|
| Tsuyoshi Kosaka | Pete Williams |
| Tsuyoshi Kosaka via Decision (Unanimous) | |
| Time Round 1 @ 15:00 |
Referee John McCarthy |
| Fight #5 | |
|---|---|
 UFC Welterweight Title Bout |
|
|
|
| Pat Miletich | Mikey Burnett |
| Pat Miletich via Decision (Split) | |
| Time Round 1 @ 21:00 |
Referee John McCarthy |
| Fight #6 | |
|---|---|
| Heavyweight Bout | |
|
|
| Pedro Rizzo | David Abbott |
| Pedro Rizzo via KO (Punch) | |
| Time Round 1 @ 8:07 |
Referee John McCarthy |
| Fight #7 | |
|---|---|
| Light Heavyweight Bout | |
 |
 |
| Vitor Belfort | Wanderlei Silva |
| Vitor Belfort via TKO (Punches) | |
| Time Round 1 @ 0:44 |
Referee John McCarthy |
| Fight #8 | |
|---|---|
| UFC Light Heavyweight Title Bout |
|
|
|
| Frank Shamrock | John Lober |
| Frank Shamrock via TKO (Submission to Punches) | |
| Time Round 1 @ 7:40 |
Referee John McCarthy |