Hall went four for four at the plate and hit three home runs.
"I have had a couple of games in my life where I hit two home runs," said Hall. "I've never had a three home run game. I saw the ball really well tonight and just tried to put it in play."
"I have never seen that done before," said Purdy coach Joshua Hughes. "Cody is a player who is able to carry our team at the plate. Tonight, he was on and had a great game."
The Wildcats held the Eagles in check the first three innings.
Hall opened the fourth inning with a shot that towered over the fence in left center field. Cameron Terry walked, and Alex Mareth singled. Quin O'Hagan scored Terry on a sacrifice. The Wildcats' defense then imploded, committing errors on three consecutive balls hit into the air by Tyler Scott, Austin Hancock and Reese Stevenson. By the end of the fourth inning, Purdy led 5-0.
Terry was efficient on the mound for the Eagles in earning the victory. Terry threw six innings, yielded five hits, struck out six and walked one in his 81-pitch performance.
Purdy's defense erased Diamond scoring threats in the second and third innings with double plays. In the fifth inning, Hancock made a circus catch against the wall in center field that ended the inning and saved at least two runs.
Hall's blast to open the fifth inning cleared the fence in right center field and ignited a four-run frame to give the Eagles a 9-0 advantage.
Hall's third round tripper of the game skied above the 300-foot sign and the 20-foot tall flag pole in center field, landing in the middle of a cluster of trees well beyond the fence. The jolt gave Purdy the necessary 10 runs to initiate the mercy rule and end the game.
"We didn't play a perfect game, but we pulled out the win," said Hughes. "We earned a win over a district opponent and that is always a positive event."
Terry and Drew Williams each had a double for Purdy, and Hancock added two RBI.
The Eagles begin play in the Monett Tournament tonight against the host Cubs. First pitch is set for 4:30 p.m.