December 28, 1988: Indiana 34, South Carolina 10.

Indiana, in what probably was Bill Mallory's second finest season, defeated South Carolina 34-10 in the Liberty Bowl. Here's the box score (click for full size):

The Hoosiers completely dominated the game. IU led 17-0 at halftime and allowed only one touchdown, on a blocked punt. IU outgained the Gamecocks 575-153 and allowed only 23 rushing yards. Dave Schnell threw for 378 yards and two touchdowns and Anthony Thompson in what sadly was his last bowl appearance, scored two touchdowns and rushed for 140 yards on 26 carries. The Hoosier defense also did its part, picking off South Carolina quarterback Todd Ellis three times.

Here is the recap from the New York Times:

FOOTBALL Indiana Wins in Liberty Bowl: Dave Schnell passed for 378 yards and 2 touchdowns, including an 88-yard game-breaking toss to Rob Turner, leading Indiana to a Liberty Bowl victory over South Carolina last night. The victory capped an 8-3-1 season for Indiana. South Carolina ended the year 8-4. The Gamecocks never have won a bowl game, dropping to 0-8 with the loss. Collin Mackie had kicked a 43-yard field goal for South Carolina, making it 20-10. But Schnell then put the game away on the first play of the fourth quarter. He spotted Turner behind the secondary and Turner pulled in the pass at the Gamecocks' 40. He never was touched on the longest scoring pass in Liberty Bowl history.