ATLANTA (AP) — Bo Wallace threw four touchdowns passes in a sloppy season opener, and No. 18 Mississippi pulled away in the fourth quarter to beat Boise State 35-13 on Thursday night.

Shaking off Wallace’s three first-half interceptions, the Rebels (1-0) got the victory before a sparse crowd in the Chick-fil-A Kickoff Game. But it was hardly the sort of convincing performance they were hoping for entering the season with their highest ranking since 2009.

Ole Miss led only 7-6 entering the fourth quarter before finishing off Boise State (0-1) when Wallace threw for TDs on three consecutive throws, ruining the debut of new Broncos coach Bryan Harsin.

Cody Core hauled in a pair of TDs: a 30-yarder in thez final minute of the first quarter, then a 76-yarder midway through the fourth after grabbing a short pass on a slant route and breaking free down the middle of the field.

Also in the final period, Wallace went to Laquon Treadwell for a 14-yard TD and hooked up with Quincy Adeboyejo on a 31-yard scoring play.

That was more than enough against Boise State, which was coming off its worst season since 1998 (8-5) and seems to have lost its BCS-busting swagger. The Broncos had first-and-goal at the Ole Miss 1 in the second quarter, ran three straight plays that lost a total of 2 yards, and settled for a field goal. More telling, when still in the game and facing fourth-and-3 at the Rebels 40, they took a delay of game and punted the ball away.

For much of the night, neither team looked as if it was ready for the season. Wallace’s three picks before halftime were matched by his Boise State counterpart, Grant Hedrick. For good measure, both QBs also had one picked off in the end zone, ruining good scoring chances.