ARLINGTON — Mansfield Summit came out fast and rolled to an 88-65 victory at home over Arlington Seguin in an important District 15-4A game Friday.“It’s huge,” Jaguars coach Jason Mutterer said of the win. “Our goal right now is to make the playoffs. Game by game, this district is a beast. It doesn’t matter if it’s the eighth-place team or Lancaster — it’s a beast.”The victory pulled Summit (15-9, 6-3 15-4A) into a tie with Seguin (11-13, 6-3) in the district standings.Summit used an 11-2 run late in the first period to take a 28-13 lead. Corinithian Ramsey, who led all scorers with 23 points, converted a four-point play late in the first half to give the Jaguars a 50-29 advantage at intermission.Seguin showed some life in the third period. A Karim Cole basket capped a 17-2 Cougars run that cut into the lead, but Summit stretched that lead to 65-56 by the end of the third.“We became complacent,” Mutterer said. “We didn’t get back in transition. We didn’t play with the same intensity.”The Jaguars regrouped in the fourth period. A Terrance Hubby dunk made it 67-56, and Summit cruised the rest of the way. Hubby finished with 19 points and Jabeeri Fountain added 12.Devin Roby-Davis led Seguin with 16 points, and Josh Parris contributed 13.