"I was just trying to fill up the strike zone and stretch out the 40-plus pitches as much as I could," Matz told Newsday.
Matz threw five curveballs and five changeups to go along with the 31 fastballs that ranged from 91-94 mph.
Matz is expected to pitch again on Tuesday for Double-A Binghamton, and he will throw 60 pitches, according to the Binghamton Press & Sun Bulletin.
The southpaw has made two Major League starts this year (13 2/3 innings), posting a 1.32 ERA with 14 strikeouts and five walks.
Joey Nowak is a reporter for MLB.com. Follow him on Twitter at @joeynowak. This story was not subject to the approval of Major League Baseball or its clubs.