"Vientos was right before the game," Mendoza said. "He was hitting in the cages, obviously, and then reported that abdominal, some soreness there.

"The trainers are telling me that he's day-to-day. As of right now, we're not planning on doing any imaging or anything like that, but we'll see where we're at tomorrow."

Vientos added that it was on his left side.

"I just felt a tightness in my stomach area and just a weird pain," he said. "Took a swing in the cages off the machine and just felt it off one swing, and then I took another one, then I stopped."

Will Vientos return to the lineup for Saturday's 7:15 p.m. game?

"We'll see," Vientos said. "I'm going to come in tomorrow and see how I feel, talk to the trainers and they'll let me know."

Third baseman Brett Baty started in place of Vientos and delivered a 2-for-4 game while batting ninth for the Mets (30-21) against Los Angeles (32-19).

"I thought we played hard," said Vientos, who is slashing .232/.299/.375 with five home runs and 18 RBI through 46 games. "It was a tough game, tough conditions -- it was raining -- and, honestly, both teams competed and I think we tried our best out there."