Matt Harvey is scheduled to start Game 5 of the NLCS, but the New York Mets are wary of swelling in the right-hander's triceps.

Terry Collins suggested that Bartolo Colon or Jonathon Niese might be needed to start against the Chicago Cubs if the series goes five games and Harvey is unable to take the mound.

Harvey was struck with a line drive off the bat of Dexter Fowler in the sixth inning of Saturday's opener against the Cubs.

"He's pretty sore and pretty swelled up," Collins said. "He, as we sit here today, is a go. But that could certainly change in next couple of days. ... I was pretty surprised at how swelled up it was yesterday. So we certainly are going to keep a really close eye on it the next couple of days."

Harvey, who is 2-0 with a 2.84 ERA in two postseason starts, lightly tossed a baseball in the outfield at Wrigley Field on Monday.