The team will seek a second opinion on the injury, but it could ultimately mean Lucchesi has Tommy John surgery, which would end his 2021 campaign and much of, if not all, of his 2022 campaign, as well.
Lucchesi, 28, is 1-4 with a 4.46 ERA this season. He last pitched Friday, and allowed four hits in 5.1 scoreless innings against the Washington Nationals.
The Mets had hoped to get Noah Syndergaard back this month, but the right-hander had a setback while rehabbing from Tommy John surgery. In addition, Carlos Carrasco has yet to pitch this season due to a hamstring injury.