MIDLOTHIAN — Red Oak’s Hunter Gonzalez ended a pitching duel Friday in the bottom of the 10th with a walk-off single to center field, giving the Hawks a 2-1 victory over Mansfield Legacy at Midlothian High School.The victory forces a decisive third game in the best-of-three Class 4A Region II quarterfinal series at 1 p.m. Saturday at Midlothian. Red Oak (23-14) ended a seven-game win streak by Legacy (26-10), which had beaten its District 15-4A rivals in three games this season.The single by Gonzalez scored Mike Tamez from second in a close play at the plate. Senior left-hander Blake Wilson (7-2) pitched all 10 innings for Legacy, giving up two runs on nine hits. The Hawks manufactured a run in the bottom of the second. Caleb Horton singled up the middle, advancing to third on a sacrifice bunt and a fielder’s choice. Horton scored on a single up the middle by Ian Tyra.After Tyra’s hit, Wilson retired 13 of the next 14 Red Oak batters, allowing only a walk in the third.The Broncos tied the game in the top of the sixth. Legacy leadoff hitter Marcus Perez hit a sinking liner, which bounced past Red Oak’s diving right fielder for a triple. Corey Murray drove in Perez with a sharp single to right center.Before the sixth, Legacy’s only two hits had been a pair of doubles by third baseman Dalton Dunn, who also reached on two walks, never advanced past second.Red Oak starter Zach Pollard gave up a run on four hits in seven innings. He struck out four. In Pollard’s first five innings, 10 of Legacy’s 15 outs came on ground balls.Tamez relieved Pollard, striking out four in two innings before running into trouble in the ninth. Tyler Welch replaced Tamez with the bases loaded and two outs, getting Legacy’s Garrett Bell to fly out to center to end the inning.