Colon has been dealing with back spasms, but worked out at Citi Field on Thursday, which was an off day for the team.
"[Colon] threw his long toss which he likes to do," Mets manager Terry Collins said Friday afternoon. "[He] felt great, so he’ll be there Saturday."
That being said, Collins has also instructed Daisuke Matsuzaka -- just called up from Triple-A -- to prepare as if he's starting Saturday.
"Just in case something happens, with the fact that it’s gonna be somewhat cool tomorrow," Collins said. "If Bartolo’s back stiffens up on him, then [Matsuzaka's] gotta be ready."
"We’ll see how his finger holds up today," Collins said.
If Mejia can't make his next start, scheduled for Monday against the St. Louis Cardinals, Matsuzaka would replace him -- if he doesn't have to replace Colon, of course.