Larry Nixon’s 2-yard touchdown with six seconds remaining gave DeSoto at 48-41 victory Monday over Euless Trinity at Waco ISD Stadium.
The Eagles (13-0) will face Allen (13-0) in a 5A Division I semifinal.
Trinity (11-3) had taken a 41-40 lead with 2:31 remaining. The Trojans trailed 28-14 at half time but took the lead on two touchdown passes by Christian Hammack.
DeSoto beat Trinity in Week 2, 61-38.