Tight end Craig Stevens didn't practice Wednesday because of soreness in his knee.
If Stevens, the Titans primary blocking tight end, is in doubt for Sunday's game with the Washington Redskins, it could hurt Tennessee's running game. Neither Bo Scaife nor Jared Cook are block-first tight ends.
“We'll see how he is,” Titans coach Jeff Fisher said when asked whether Stevens would be able to practice this week.
Also, safety Vincent Fuller has a mild strain his in right hamstring and did not practice on Wednesday.
Fuller said he injured it running down on a kickoff Sunday in Miami.
“I'm doing fine. I look forward to getting out there as quick as possible and practicing,” said Fuller, who indicated he hoped to practice before the week is over. “It was something I'd never experienced before. I felt something, but thank goodness it wasn't serious.”
Kicker Rob Bironas sat out with a back injury suffered on the tackle he made in Sunday's game on a kickoff return.
“There's a little tightness in the back, but we'll let it settle down,” Bironas said.
Bironas said he could have kicked a field goal on Sunday even after the injury.
Collins couldn't offer a timetable on his injury.
"It's responded well to some treatment, but it's still only a few days out. I'll continue to work and we'll see how it goes from here," Collins said.
Defensive tackle Tony Brown (knee) was rested, but will practice Thursday according to Fisher.
Cornerback Cortland Finnegan (shin) was limited in Wednesday's practice.