Last Sunday, Aaron Laffey made his Mets debut in place of the injured Shaun Marcum. It came less than 48 hours after he took a red-eye flight from Sacramento, where he was a member of the team’s Triple-A Las Vegas affiliate. It was all whirlwind. He had not slept sufficiently. He was exhausted.

The fatigued left-hander labored through 4⅓ innings against a punchless Marlins lineup. He faced 24 hitters and threw 90 pitches. He surrendered three runs on 10 hits. Twelve batters reached base in all.

It took another two days before Laffey finally felt acclimated.

"That was the first day I slept through the night," Laffey said. "I woke up and I was like, ‘Man, I feel normal.’ I took a couple days to get adjusted, back to the time change now with the two times changes in a week."

Laffey was scheduled to make his second start Tuesday against the Rockies, but Monday’s postponement had manager Terry Collins reconsidering the decision. On Monday, Collins said Jeremy Hefner might get the start in the doubleheader’s nightcap instead.

If Laffey is skipped, he may be needed for just one more start if Marcum continues progressing. The right-hander is slated to pitch "three or four innings" at the team’s complex in Port St. Lucie, Fla., according to Collins.

Marcum, who is recovering from nerve inflammation in his neck, would not be available until the middle of next week, at the earliest.

In the nine days since his start, Laffey has pitched just one inning, a relief effort Friday in Minnesota. He used the appearance out of the bullpen as a test. He and pitching coach Dan Warthen studied the tape of his initial outing and each concluded there was a mechanical flaw in his delivery.