New York Mets pitcher Steven Matz could miss his next start because of elbow discomfort.

The left-hander, who left his start Friday at Atlanta in the fifth inning, underwent an MRI exam Monday in New York. He is scheduled to start Wednesday at Washington.

“We haven’t committed to Steven just yet,” manager Terry Collins said Monday. “We’ll have him re-evaluated and we’ll wait to see where we are here tomorrow, and we’ll probably know more tomorrow.”

Matz is 7-3 with a 3.29 ERA this year. He won seven consecutive starts earlier this season, but is 0-2 with a 5.91 ERA in June.

Matz also underwent an MRI in May on his pitching elbow.

“It’s the same,” said Matz, who underwent Tommy John surgery in 2010. “Just kind of where I got checked out before. Nothing major — [no] structural damage, so that peace of mind is good.”

Nationals prospect

The Nationals planned to recall top prospect Lucas Giolito to make his major league debut Tuesday against the New York Mets.

The No. 16 pick in the 2012 amateur draft, Giolito is 5-3 with a 3.17 ERA and 72 strikeouts in 71 innings at Double-A Harrisburg this season. The 21-year-old right-hander is ranked the No. 1 prospect in the Nationals’ organization by Baseball America.

“He’s ready for the task,” manager Dusty Baker said Monday.

A spot opened in Washington’s rotation when right-hander Stephen Strasburg was placed on the disabled list Sunday because of an upper back strain. Strasburg was scratched from his last two starts and underwent an MRI exam Monday.

Giolito had Tommy John surgery three months after he was drafted. He struck out 110 in 98 innings at Class A Hagerstown in 2014, then struck out 131 in 117 innings at Class A Potomac and Harrisburg last season.

Yankees ticket deal

The Yankees and StubHub ended their squabble, announcing a sponsorship agreement Monday that sets an advertising minimum price for resale tickets.

StubHub will become the official fan-to-fan ticket reseller for the Yankees, replacing Ticketmaster’s Yankee Ticket Exchange, and will be fully operational July 7. Ticketmaster will still remain the primary ticket vendor for the Yankees.

The agreement is worth about $100 million to the team over 6½ years, a person familiar with the negotiation said. The person spoke on condition of anonymity because the value was not disclosed.

Speaking at a news conference, Yankees President Randy Levine said generally the lowest price a seat can be advertised for resale will be 50 percent of what a ticket is sold for as a part of a full-season plan.

The ticket resale service through StubHub will be fully operational on July 7 for the Yankees’ July 15 game.