Marte has not played for the past month and has been working his way back from a fractured middle finger. Mets manager Buck Showalter expressed hesitation in recent days about Marte's injury progress, saying the outfielder struggled to grip a bat and baseball. Despite that, the team seems to believe he can contribute to the team in the NL Wild Card Series.
While Marte normally bats second in the Mets lineup, Showalter placed him as the sixth hitter in the wild-card series opener.
"There's some unknown," Showalter said. "Who's 100 percent this time of year? We'll see. I think it's evidence by where he's hitting in the order a little bit. I'm hoping that things go well and we move him back up tomorrow."
Marte would not answer if he felt 100%, but added he would make adjustments if the inflammation in his right middle finger flares up. The Mets medical staff tried a variety of tape and splint combinations on Marte's finger before landing on wrap-around padding.
"In a situation like this, you kind of have to suck up the pain because it's a significant situation," Marte said. "You kind of have to fight through it."
Alvarez makes the postseason roster after the Mets called him up in the final weeks of the season. The 20-year-old slugger, ranked as the top prospect in the Mets' farm system, hit his first major league home run on Tuesday.
Darin Ruf joins the team on the postseason roster after struggling since coming over to the Mets at the trade deadline.
Left off the roster are Tyler Naquin, Mark Vientos and pitchers Carlos Carrasco, Taijuan Walker and Trevor Williams, indicating the Mets are placing more emphasis on relievers over innings eaters in the wild-card round.
The Mets will carry 12 pitchers and 14 position players.