MANSFIELD — The Mansfield Tigers poured it on in the second half Friday at Newsom Stadium to earn a 45-14 homecoming victory over Grand Prairie.The victory keeps Mansfield (5-3, 4-1 District 7-5A) in the driver’s seat for one of the district’s four playoff spots. After giving up an early touchdown, the Tigers scored 45 unanswered points against the Gophers (1-7, 0-5), and their defense had just as much to do with that as the offense. Mansfield held Grand Prairie to 48 yards rushing and 192 yards total. The Tigers’ offense was just as impressive. Running back Julius Lewis rushed for 246 yards on 24 carries and scored two touchdowns. His weaving 28-yard touchdown run late in the third quarter gave the Tigers a 38-7 lead and put the game out of reach. Grand Prairie struck first. Running back Donovan Brown converted a fourth-and-1 in Gophers territory to extend Grand Prairie’s first drive and recovered a fumbled Mansfield punt return before quarterback Matt Moreno found Trey Mason over the middle for a 26-yard touchdown.The Tigers dominated the remainder of the game. Lewis had runs of 22 and 14 yards before capping a seven-play drive with a 22-yard touchdown run, and Mansfield took its first lead on fullback Brian Williams’ 12-yard catch-and-run from quarterback Caleb Evans.