| Oct 1, 1998 | NC State 38, 11Syracuse 17upset | Box score |
| Oct 3, 1998 | Air Force 56, New Mexico 14 | Box score |
| Oct 3, 1998 | UAB 24, Louisiana 13 | Box score |
| Oct 3, 1998 | 14Arizona 31, 20Washington 28 | Box score |
| Oct 3, 1998 | 22Arkansas 27, Kentucky 20 | Box score |
| Oct 3, 1998 | Arkansas State 34, New Mexico State 31 | Box score |
| Oct 3, 1998 | Ball State 18, Northern Illinois 13 | Box score |
| Oct 3, 1998 | Bowling Green 35, Ohio 7 | Box score |
| Oct 3, 1998 | UCF 31, Toledo 24 | Box score |
| Oct 3, 1998 | 15Colorado 27, Oklahoma 25 | Box score |
| Oct 3, 1998 | Colorado State 20, UTEP 17 | Box score |
| Oct 3, 1998 | East Carolina 30, Army 25 | Box score |
| Oct 3, 1998 | Eastern Michigan 26, Kent State 17 | Box score |
| Oct 3, 1998 | 8Florida 16, Alabama 10 | Box score |
| Oct 3, 1998 | 9Florida State 24, Maryland 10 | Box score |
| Oct 3, 1998 | Fresno State 31, BYU 21 | Box score |
| Oct 3, 1998 | 12Georgia 28, 6LSU 27upset | Box score |
| Oct 3, 1998 | Georgia Tech 41, Duke 13 | Box score |
| Oct 3, 1998 | Houston 35, Memphis 14 | Box score |
| Oct 3, 1998 | Illinois 13, Northwestern 10upset | Box score |
| Oct 3, 1998 | Louisiana Tech 63, Boise State 28 | Box score |
| Oct 3, 1998 | Louisville 62, Cincinnati 19 | Box score |
| Oct 3, 1998 | Marshall 31, Miami (OH) 17 | Box score |
| Oct 3, 1998 | Miami 53, Rutgers 17 | Box score |
| Oct 3, 1998 | 25Michigan 12, Iowa 9 | Box score |
| Oct 3, 1998 | Michigan State 38, Central Michigan 7 | Box score |
| Oct 3, 1998 | Ole Miss 30, South Carolina 28 | Box score |
| Oct 3, 1998 | 2Nebraska 24, Oklahoma State 17 | Box score |
| Oct 3, 1998 | Nevada 31, UNLV 20 | Box score |
| Oct 3, 1998 | North Carolina 21, Clemson 14 | Box score |
| Oct 3, 1998 | 23Notre Dame 35, Stanford 17 | Box score |
| Oct 3, 1998 | 1Ohio State 28, 7Penn State 9 | Box score |
| Oct 3, 1998 | Oregon State 20, Utah State 16 | Box score |
| Oct 3, 1998 | Pittsburgh 35, Akron 0 | Box score |
| Oct 3, 1998 | Purdue 56, Minnesota 21 | Box score |
| Oct 3, 1998 | San Diego State 24, Tulsa 14 | Box score |
| Oct 3, 1998 | 21USC 35, Arizona State 24 | Box score |
| Oct 3, 1998 | SMU 28, Hawai’i 0 | Box score |
| Oct 3, 1998 | 3Tennessee 17, Auburn 9 | Box score |
| Oct 3, 1998 | Texas 54, Iowa State 33 | Box score |
| Oct 3, 1998 | 18Texas A&M 24, Kansas 21 | Box score |
| Oct 3, 1998 | TCU 19, Vanderbilt 16 | Box score |
| Oct 3, 1998 | Texas Tech 31, Baylor 29 | Box score |
| Oct 3, 1998 | Tulane 21, Southern Miss 7 | Box score |
| Oct 3, 1998 | 4UCLA 49, Washington State 17 | Box score |
| Oct 3, 1998 | 10Virginia 52, San José State 14 | Box score |
| Oct 3, 1998 | 16West Virginia 45, Navy 24 | Box score |
| Oct 3, 1998 | Western Michigan 27, UL Monroe 14 | Box score |
| Oct 3, 1998 | 13Wisconsin 24, Indiana 20 | Box score |
| Oct 3, 1998 | Wyoming 27, Utah 24 | Box score |