DeGrom allowed five hits, struck out two and walked none. He said he had to slow down his fastball a bit so he could locate better.
"Trying to take a little off to get it down," deGrom said. "I don't know it was kind of a battle out there. Slider was probably the pitch I had the most control of. I was throwing a lot of them just because I was struggling throwing a fastball and a changeup for a strike."
Yankees starter Ivan Nova allowed three hits in three scoreless innings and induced a pair of double-play grounders.
Yankees: Nova is hopeful he can rebound back after going 6-11 with 5.07 ERA last season in his return from Tommy John surgery.
"Last year? At some point, all my pitches, I had a hard time controlling them -- curveball, four-seamer, sinker," Nova said. "It's very different from last year right now. I didn't get the rest. That helps. I said it before, the way I feel right now? In a long time I (haven't felt) the way I feel right now."
Mets: DeGrom said he is more confident after his first full season in the majors. The 2014 NL Rookie of the Year was 14-8 with a 2.54 ERA last season.
"I kind of wanted to prove the first year wasn't a fluke and go out there and pitch well my second year," he said. "I think that gives me a little more confidence going into this year."
METS TO HONOR FORDE IN 2016
Mets captain David Wright, speaking at the memorial service for Shannon Forde at Citi Field, said the championship belt given to a Mets player after every win this year will have a shamrock and a pink ribbon in memory of Forde, the team's senior director of media relations. Forde died last week at age 44 after a 3 1/2-year battle with breast cancer.
New Yankees closer Aroldis Chapman is to pitch for New York for the first time Thursday in a split squad against Toronto at Steinbrenner Field.
"I'm very happy I'm getting an opportunity to pitch in a Yankees uniform," Chapman said through a translator. "Yes, I'm looking forward and feel like I'm anxious to be on the field and face hitters in a real game situation."
Chapman, acquired from Cincinnati in December, will begin serving a 30-game suspension on opening day under baseball's new domestic violence policy.
Andrew Miller will retain the closer role during Chapman's absence.
Yankees: 2B Starlin Castro is listed on the travel roster for Thursday's split-squad game against Baltimore, three days after having a root canal.
Yankees: RHP Nathan Eovaldi makes his first start Thursday, against the Blue Jays, since his season ended Sept. 5 due to right elbow inflammation. He was slowed earlier this spring training because of mild groin tightness. ... RHP Bryan Mitchell, bidding to be the long man out of the bullpen, starts against Baltimore.