The Marlins outfield prospect went 4-for-4 with a walk and a two-run triple as the Surprise Saguaros remained unbeaten with a 7-1 triumph over the Peoria Javelinas.
With the Saguaros leading, 2-1, in the fourth inning, Mattison hit the first pitch from Mets right-hander Collin McHugh (Mets) into left field for a two-out triple that scored Rangers prospects Elio Sarmiento and Leury Garcia.
"I believe it was first pitch. I got a fastball up and away and I was on time and put a good swing on it and was fortunate to split the gaps in the outfield," Mattison said.
With his perfect night, the former 28th-round Draft pick raised his Arizona Fall League average to .538. Mattison, who also scored a run, believes his strong start is the result of playing to his strengths.
"I think I'm just trying to stay within myself and get on base and try to win some games," the 26-year-old outfielder said. "Try not to overthink things, go with what pitchers are giving me and battle back in the count. If I'm in a good hitters count, try and drive the ball."
One of Mattison's goals this fall is to work on better utilizing his speed. He was second in the Double-A Southern League with 38 stolen bases this season.
"Mainly eliminate the fly ball," he said. "Shorten up my swing, hit the ball on the ground and use my speed. Show the bunt, use the bunt, use my speed to get on base any way you can."
Mattison earned Southern League All-Star honors at Jacksonville, batting .260 with eight homers, 49 RBIs and 87 runs scored. He also raised his on-base percentage 80 points to .353.
"That was the biggest thing, trying to get on base and let the guys behind me drive me in," he said.
Matt Dominguez, the Marlins' top prospect, drove in a pair of runs to help the Saguaros improve to 4-0. Former first overall pick Tim Beckham (Rays) slugged a two-run homer and Anthony Seratelli (Royals) also went yard.
Marlins right-hander Alex Sanabia (1-0) was credited with the win after allowing a run on two hits and striking out two over three innings.
McHugh (0-1) was reached for three runs on five hits over two frames.
Jefry Marte (Mets) drove in the lone run for Peoria (1-4) with a second-inning sacrifice fly.
Robert Emrich is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.