Collins said Sunday morning that he was still unsure of his starter for that game, but that McHugh and Hefner were the most likely options.
"We've got some dates coming up, and we need some starting pitching," Collins said. "There's three that I can [think of]."
Hefner and McHugh each pitched in the Mets' 9-6 loss Saturday night, with Hefner being first out of the bullpen in relief of Jenrry Mejia. McHugh faced four batters in the fifth, and he combined with Hefner to pitch 1 2/3 innings, allowing two runs on three hits.
After letting a run score on a wild pitch and giving up a two-run homer to Rickie Weeks in the fourth, Hefner settled in and retired the next three batters. McHugh got a pair of flyouts sandwiched around a pinch-hit RBI triple and an RBI single.
"I don't know when it is," Collins said of McHugh's start, "but he's going to start later on. He's not on any definite rotation. The days off have kind of scrambled up the rotation."