After the early Hearts goal, play became much more back and forth, with both teams getting their chances in offensively.
Katz found the back of the net again with 9:58 remaining, using some fancy footwork to deke his defender and go low left side for his second goal.
"I've been working a lot on my footwork and speed in the offseason, I thought I'd try it out in the first game, and it worked," he said.
While Frank Kasdorf posted a clean sheet in his first game in goal, replacing last year's goalie Dalton, he had plenty of help defensively.
Sophomore Andrew Bingham made his presence known to the Mattoon strikers, warding off a goal midway through the first half with some strong bodying. He also stepped up on a crucial corner kick in the second half, making his way to the ball before the Green Wave could and clearing it.
Witges said the sophomore earned his way in to the starting lineup as a defender, and despite wanting to play offense did what Witges thought was best for the team.
"He said 'Okay coach, whatever you need,'" Witges said. "That's the kind of response you want as a coach from any player. He played a great game."
Effingham (1-0-0) earned three points with the tournament win, and will face Charleston Friday at 4 p.m. for the Red Pool lead.
Effingham 1 1 2
Mattoon 0 0 0
29:10 Effingham goal, Tyler Katz (Phil Knight assist), 1-0
09:58 Effingham goal, Tyler Katz, 2-0
Belford shines in Wooden Shoes loss
Charleston found the back of the net with 25:30 remaining when Taylor Garrett's cross was knocked in by Elliott Griffin past Teutopolis goalie Seth Belford.
The 1-0 lead would hold up, but coach Dustin Jansen had nothing but praise for his senior keeper.
"Seth, player of the game by a long shot," he said. "He had so many good saves out there, he kept us close."