Nick Ahmed's RBI single with two outs in the 15th inning sent the Arizona Diamondbacks to a 2-1 victory over the Reds on Monday night, extending Cincinnati's miserable return from the All-Star break. Ahmed's single off J.J. Hoover (1-8) gave the Reds their ninth loss in 10 games since the All-Star break, a slump that has dropped them below .500 for the first time since June 21. The Reds struck out 18 times and stranded nine runners, wasting a lot of chances to end it in nine innings. Cincinnati's Aroldis Chapman fanned the side in the ninth, extending his major league record for a reliever to 44 consecutive games with at least one strikeout. Mesoraco led off the second with his 17th homer off rookie Chase Anderson, ending a streak of three straight games at Great American without a homer — the longest in the ballpark's 12 seasons. Miguel Montero singled home the tying run in the fourth off Homer Bailey, who gave up five hits in eight innings. Anderson allowed three hits and matched his career high with eight strikeouts in seven innings, retiring the last 11 batters he faced. Arizona right fielder David Peralta saved a run in the fourth with a diving, backhand catch of Brayan Pena's fly ball. Many of the 30,288 fans flashed their cell phone camera lights during extra innings and did the wave to amuse themselves. Reds reliever Jumbo Diaz faced Mark Trumbo in the 12th and gave up a single that ended a streak of 14 consecutive Diamondbacks retired.