"Everybody says the first one's a little different," deGrom said. "I think just whenever I get the call, I'm going to go ahead and leave."
Until that happens, deGrom will stick around Citi Field, never far from his phone. He participated in the Mets' team workout Thursday.
It may not be an ideal situation for the Mets, but they feel they are covered should deGrom need to head to LaGuardia at the last moment. Colon, who recorded four outs on Opening Night in Kansas City, is accustomed to pitching on short rest with little notice, much as he did coming out of the bullpen last October.
"One thing about Bartolo, he handles all the situations," Mets manager Terry Collins said. "He's such a veteran, he's used to having rain delays, used to getting spot starts, all those things that have occurred throughout his career. So if something happens to Jake and we need a guy, I think he's the best guy to step in."
Still, the Mets hope that deGrom -- an All-Star last season and their best pitcher statistically -- will be able to pitch against the Phillies.
"I know Jake's pumped up," Collins said. "But I know he'd also like to have that baby arrive, and we can move on."
Anthony DiComo is a reporter for MLB.com. Follow him on Twitter @AnthonyDiComo and Facebook, and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.