Martinez was injured Monday night in a game in which he gave up a career-high six first-inning runs.
For the next week, Martinez will wear a protective boot and limit his activities to playing catch and riding an exercise bike.
"Hopefully, he'll get five starts heading into the postseason," manager Willie Randolph said. "We want to do the right thing and take the time to get it right."
The team hasn't decided on Martinez's replacement for Saturday's start against Colorado, but speculation falls on two Triple-A left-handers, Oliver Perez and David Williams.
REPLAY: The Mets continued their offensive funk Wednesday, getting shut out for the second time in three games after being blanked three times in the first 116. This time, the hitters wasted a strong Tom Glavine performance in a 3-0 loss to the Phillies. Glavine allowed three runs on six hits in seven innings.
The Mets have been outscored 27-4 in the past three games, all losses.
RHP Pedro Martinez was placed on the 15-day disabled list with a strained right calf. Martinez left Monday's game at Philadelphia after giving up a career-high six runs in the first inning.
RHP Heath Bell was recalled from Triple-A Norfolk when RHP Pedro Martinez was placed on the 15-day disabled list. He made 16 relief appearances for the Mets earlier this season, posting no record and a 3.20 ERA.
Former Mets OF Darryl Strawberry told the team he would attend a 20-year reunion Saturday of the 1986 World Series championship team.
LF Cliff Floyd, on the disabled list with a strained left Achilles tendon, is still not ready to do anything outside of riding an exercise bike.
C Ramon Castro, on the disabled list with a sore left ribcage muscle, is still having problems, and the team doesn't know when he will return.
BY THE NUMBERS: 3 -- Number of Mets with at least 74 RBIs.