Aaron Laffey and Collin McHugh appear to be the most likely candidates to replace Marcum.

WSJ: Mets' Shaun Marcum unable to throw simulated game

"The snow was over the tops of our shoes, up towards your ankle, " left-hander Aaron Laffey said.

WSJ: Mets-Rockies game postponed by spring snowstorm

Gee is part of the reshaped rotation that for now includes Jonathon Niese, Matt Harvey, Jeremy Hefner and Aaron Laffey.

WSJ: Gee pitches well in return but Mets lose to Padres

Mets pitcher Aaron Laffey struggled a bit in his first start of the spring, allowing four runs and five hits in three innings.

WSJ: Navy man Harris struggles on mound in Cards debut

Jeremy Hefner and newcomer Aaron Laffey, both essentially spot starters last season, were in line to fill in early for Santana and Marcum (neck).

WSJ: Married to the Mets: Wright waiting for young help

Justin Ruggiano, Chris Valaika and Donovan Solano (three hits) each had an RBI double off starter Aaron Laffey to give the Marlins an early 3-0 cushion.

WSJ: Marlins lose to Mets, waste Fernandez's fine debut

Justin Ruggiano, Chris Valaika and Donovan Solano (three hits) each had an RBI double off substitute starter Aaron Laffey to give the Marlins an early 3-0 cushion.

WSJ: Byrd's single in 9th lifts Mets over Marlins 4-3

With Santana not ready to start the season, Collins said that Aaron Laffey might also get a look as a potential starter before spring training is over.

WSJ: Lucas Duda homers in Mets' win over Braves

Lyle Overbay hit a go-ahead RBI triple and Vernon Wells had a sacrifice fly off Aaron Laffey in an inning the fill-in starter for Josh Johnson walked four.

WSJ: Sloppy Blue Jays fall again to Yankees

Aaron Laffey likely will start in Marcum's place Sunday.

WSJ: Harvey 1 hit, 10 Ks in 7 innings, Mets top Padres