Ewing added his second goal three minutes later. "Ewing was huge to step up and put those in," Holt said.
Garrard scored first on a goal from Jacob Denny less than five minutes into the game.
"That was something we didn't want to happen. We talked about coming out focused and ready to play from the start," Holt said. "That was not how we wanted to start."
But Mercer regrouped, and Jeff Bostic tied the game with a goal off a corner kick from Daarik Gray to make it a tie game at the half.
"Derrick Blacketer had one of his best games, and our seniors led us in this win," Holt said.
Danville and Boyle County advanced to Thursday's 29th District Tournament championship with a pair of 4-0 wins.
Boyle (16-2) got a pair of goals from Lauren Paynter to beat Marion, while Danville (15-5-1) had three first-half goals to knock off Taylor County.
Boyle's Lauren Smith scored the game-winner midway through the first half with a shot from 25 yards out that got by the Marion goalkeeper. Emily Woolum's blast gave the Boyle another first-half goal.
But Boyle coach Brian Deem was not pleased with his team's play.
"We came out flat. Marion came out with a purpose and attacked us. We came out on our heels a bit and did not possess the ball," Deem said. "But once we settled down we began possessing and working on combinations we prepared for on Monday."
Paynter got her first goal when she headed the ball by the Marion sweeper and beat the goalie one-on-one. She then scored again off an assistsfrom Kristan Paynter. Boyle outshot the Knights 28-5 and led 7-0 on corner kicks.
Danville got a goal and assist each from Maddie Meckes and Maggie Hobson and Taylor Brown had two saves in the shutout win.
"We played a very good game. Taylor came out aggressive and physical, and we did a good job of not losing our heads and composure," Danville assistant coach Brian Gover said. "We look forward to the Boyle game. They beat us last time, but we feel we have a great chance against them Thursday."
Jordan Beth Davis scored off a pass from Meckes less than 10 minutes into the game. Rachel Ricker scored off a Hobson assist and Meckes had an unassisted goal to put Danville up 3-0 at the half.
Hobson then scored with about 12 minutes left to play off a pass from Bethany Schulz.
In the 30th District, the Lincoln County boys lost to Somerset 6-1 in one semifinal and Southwestern beat Pulaski County 3-0.
In the girls tournament, the Patriots fell to Southwestern 6-1 and Somerset beat Pulaski 4-1.