The No. 11 Rams scored first on a 27-yard run by Jeff Brown before the AHS defense took over with a 75-yard fumble return by Zack Burch and a 17-yard interception return by D’ondre Chanet.
Acadiana (8-2) then forged ahead 34-0 on Brown’s 63-yard run and an 8-yard run by Keith Sonnier
No. 22 Zachary (8-3) closed the gap to 34-7 in the second quarter when Dillon Beard hauled in a 30-yard pass from Mason Pace and Brandon Delhom added the extra point.
Cardaye Spencer scored on a 67-yard run for the Rams before Zachary’s Aaron Simon scored on a 72-yard pass from Pace to close the gap to 41-14.
Spencer’s 15-yard run and a 13-yard touchdown by Sonnier gave the Rams a 55-14 advantage as Acadiana scored on every offensive possession in the first half.
Dylan Scott scored twice in the third period on runs of 77- and 6-yards to push the defending 5-A champion Rams ahead, 69-14.
The Broncos scored on a 35-yard pass from Pace to Connor Haynes and Delhom’s final PAT closed the gap to 69-21.
Acadiana tied a school record for points when Edward Cormier scored on a 15-yard run in the fourth quarter.
The Rams rolled up 556 yards rushing, led by Spencer (10-131), Scott (10-123), Brown (3-96) and Sonnier (7-84).
Ladarruis Vessell led the Broncos with 128 yards on 17 carries, while Pace completed 17-of-34 for 266 yards and three touchdowns.
Aaron Simon had two catches for 81 yards and a touchdown as team mate Beard had three catches for 47 yards and a touchdown.
The loss marked the second straight year the Broncos have ended their year with a loss to Acadiana.
The Rams beat Zachary 49-7 in the second round last season before winning the state championship.