Miami Dolphins quarterback Ryan Tannehill's status for Sunday's game at the Indianpolis Colts remains uncertain as he was listed as questionable Friday with his knee injury.
If Tannehill can't play, Matt Moore would get his first start of the season.
"We're going to make a decision as soon as we have enough relevant information to make a good decision," Dolphins head coach Joe Philbin said. "We have no timetable on that."
Cornerback Richard Marshall will miss his fourth consecutive game with a back injury. Wide receiver Brian Hartline (groin/hamstring) and defensive tackle Tony McDaniel (knee) are questionable.
Marshall's arrival over the offseason helped pace the way for the Dolphins to deal cornerback Vontae Davis to the Colts. However, Davis won't have the opportunity to face his former team due to a knee injury.
Cassius Vaughn will start for Davis, with Josh Gordy becoming the primary nickel back.
Also out for the Colts is rookie tight end Coby Fleener (shoulder). Recently-signed Weslye Saunders will likely be active, and is familiar with offensive coordinator/interim head coach Bruce Arians' scheme as the two were together with the Pittsburgh Steelers last season.
"We'll just plug him in. He's the next man up until Coby comes back," Arians said. "Fortunately we had Weslye last year and he's pretty familiar with the system and he's a big, young, athletic guy who has a great future if he just stays straight."
Saunders was waived by the Steelers after serving a four-game suspension at the start of the season for taking a banned substance, and he had a history of off-field issues at South Carolina.