Both were sent off during Tuesday's 1-0 defeat at Nottingham Forest and winger Martin will now start a three-match ban while defender Stearman, who received two yellow cards, serves a one-match suspension.
Captain Carlos Edwards will be assessed after a groin injury ruled him out of only his second game this season at the City Ground.
Meanwhile, on-loan striker David McGoldrick, who bagged a late winner against Leicester last weekend, comes back into contention having been ineligible to face his parent club in midweek.
Town, 19th in the Championship table, are just five points and four places above second-bottom Peterborough ahead of their clash at London Road.
- Sports & Recreation