Duncan got hosting duties of the Class 5A Regional Tournament started off with a seventh inning rally as they won 7-3 over Altus.
Derek Bridges got the action started in the top half of the first inning when a home run to right field got the Demons on the board with a 1-0 lead over the Altus Bulldogs.
After a scoreless second inning, the Demons who were the visitors in game one got a sacrifice fly from Creed Watkins to give Duncan the 2-0 lead heading to the bottom half of the third inning.
Altus got a run back in the bottom half of the fourth with Duncan getting another big hit from senior first baseman Bridges who hit a double to score Josh Bumgarner and take the 3-1 lead in the top of the fifth.
Bulldogs got the game tied up in the bottom of the sixth as the Demons needed to go to work in the top half of the seventh to keep the easy road to a repeat appearance in the State Tournament.
Bumgarner got a lead off double and then a single moved him to third and scored on an error by the Altus left fielder to make it a 4-3 advantage for Duncan.
Brandon Miller got a single of his own to score Bridges and give the Demons the 5-3 lead all with no outs in the inning as Watkins would come around on an error from the catcher and make it 6-3 in favor of Duncan.
Jaxon Gregston got the final run of the four-run inning as a sacrifice fly scored Miller to give the Demons the lead and three outs away from heading to game two with a 1-0 record in regionals.
Bumgarner who came into pitch at the bottom half of the sixth inning got two strikeouts and a ground out play to end the game and send Duncan only two victories away from the State Tournament.
In the later Thursday game, the Demons were able to beat Bishop McGuiness 2-0 to make today's game for the Regional Championship.
Duncan will play Bishop McGuinness at 4 p.m. today at Duncan High School and the if-necessary game will follow at the conclusion of game one.