Baker, who wore a red non-contact jersey during Thursday's session, has a shoulder injury. Banta-Cain, the team's top pass rusher who is enjoying a rebound-type season, has a groin injury.
The Patriots had 10 players who didn't participate in Thursday's practice: linebacker Eric Alexander (groin), receiver Julian Edelman (forearm), defensive end Jarvis Green (knee), center Dan Koppen (knee), left tackle Matt Light (knee), safety Brandon Meriweather (foot), running back Sammy Morris (knee), receiver Brandon Tate (knee), running back Fred Taylor (ankle), and defensive lineman Ty Warren (ankle).
For the Colts, defensive end Dwight Freeney returned to practice after being held out of Wednesday's session for non-injury-related reasons. Receiver Anthony Gonzalez (knee), cornerback Kelvin Hayden (knee), quarterback Jim Sorgi (right shoulder), and kicker Adam Vinatieri (right knee) did not practice.