Top-seeded Maple Grove edged Mounds View 5-4 in nine innings Friday, emerging as the lone unbeaten in the double elimination Section 5AAAA tournament. Tyler Guerin hit a three-run homer in the top of the sixth to give the Mustangs a 3-2 lead, and Blake Geurin’s sacrifice fly in the eighth gave them a 4-3 lead, but the Crimson rallied each time. Aiden McMahon was 3-for-4 and scored four runs for Maple Grove, and Zane Vitense and Brian O’Dwyer knocked in two runs each. Aiden Hansen, Vitense and McMahon pitched for the Crimson with McMahon getting the win. Tyler Guerin pitched five innings for the Mustangs, allowing two runs, striking out 10. Brandon Cook pitched the last 3 1/3, allowing three runs, all unearned, taking the loss. The Mustangs had four errors that were costly. The Mustangs (14-8) will play Monday against Totino-Grace or Champlin Park at Osseo, 3 p.m.