| Oct 29, 1998 | BYU 13, San Diego State 0 | Box score |
| Oct 31, 1998 | Air Force 31, SMU 7 | Box score |
| Oct 31, 1998 | Alabama 30, Southern Miss 20 | Box score |
| Oct 31, 1998 | 13Arizona 38, 12Oregon 3upset | Box score |
| Oct 31, 1998 | Arizona State 38, Washington State 28 | Box score |
| Oct 31, 1998 | 14Arkansas 24, Auburn 21 | Box score |
| Oct 31, 1998 | Bowling Green 34, Marshall 13upset | Box score |
| Oct 31, 1998 | California 20, Oregon State 19 | Box score |
| Oct 31, 1998 | Central Michigan 28, Akron 27 | Box score |
| Oct 31, 1998 | 6Florida 38, 11Georgia 7 | Box score |
| Oct 31, 1998 | 5Florida State 39, North Carolina 13 | Box score |
| Oct 31, 1998 | Fresno State 28, New Mexico 20 | Box score |
| Oct 31, 1998 | 23Georgia Tech 31, Maryland 14 | Box score |
| Oct 31, 1998 | Houston 34, East Carolina 31upset | Box score |
| Oct 31, 1998 | Idaho 41, North Texas 23 | Box score |
| Oct 31, 1998 | 4Kansas State 54, Kansas 6 | Box score |
| Oct 31, 1998 | UL Monroe 20, UAB 14 | Box score |
| Oct 31, 1998 | Memphis 35, Arkansas State 19 | Box score |
| Oct 31, 1998 | 25Miami 35, Boston College 17 | Box score |
| Oct 31, 1998 | Miami (OH) 35, Ohio 21 | Box score |
| Oct 31, 1998 | 22Michigan 15, Minnesota 10 | Box score |
| Oct 31, 1998 | Michigan State 29, Northwestern 5 | Box score |
| Oct 31, 1998 | Ole Miss 37, LSU 31 | Box score |
| Oct 31, 1998 | 18Missouri 28, Texas Tech 26 | Box score |
| Oct 31, 1998 | Nevada 52, Boise State 24 | Box score |
| Oct 31, 1998 | NC State 46, Clemson 39 | Box score |
| Oct 31, 1998 | 16Notre Dame 27, Baylor 3 | Box score |
| Oct 31, 1998 | 1Ohio State 38, Indiana 7 | Box score |
| Oct 31, 1998 | Oklahoma 17, Iowa State 14 | Box score |
| Oct 31, 1998 | 10Penn State 27, Illinois 0 | Box score |
| Oct 31, 1998 | Purdue 36, Iowa 14 | Box score |
| Oct 31, 1998 | Rice 35, Colorado State 23upset | Box score |
| Oct 31, 1998 | Rutgers 21, Temple 10 | Box score |
| Oct 31, 1998 | USC 33, Washington 10 | Box score |
| Oct 31, 1998 | 17Syracuse 45, Pittsburgh 28 | Box score |
| Oct 31, 1998 | 3Tennessee 49, South Carolina 14 | Box score |
| Oct 31, 1998 | Texas 20, 7Nebraska 16upset | Box score |
| Oct 31, 1998 | 8Texas A&M 17, Oklahoma State 6 | Box score |
| Oct 31, 1998 | UTEP 30, Hawai’i 13 | Box score |
| Oct 31, 1998 | Toledo 16, Northern Illinois 3 | Box score |
| Oct 31, 1998 | 19Tulane 72, Louisiana 20 | Box score |
| Oct 31, 1998 | Tulsa 20, UNLV 16 | Box score |
| Oct 31, 1998 | 2UCLA 28, Stanford 24 | Box score |
| Oct 31, 1998 | Utah 49, San José State 17 | Box score |
| Oct 31, 1998 | Utah State 29, New Mexico State 26 | Box score |
| Oct 31, 1998 | Vanderbilt 36, Duke 33 | Box score |
| Oct 31, 1998 | 15Virginia 38, Wake Forest 17 | Box score |
| Oct 31, 1998 | 20Virginia Tech 27, 21West Virginia 13 | Box score |
| Oct 31, 1998 | Western Michigan 48, Kent State 23 | Box score |
| Oct 31, 1998 | Wyoming 34, TCU 27 | Box score |