The prognosis for a few other players, however, such as receiver Marvin Harrison (knee), defensive end Robert Mathis (knees), safety Antoine Bethea (knee) and running back Joseph Addai (back) appear to be much better.
"(Most of the injured players) will play in the playoffs unless something happens," Colts coach Tony Dungy said. "Robert's got a good chance to play this week. Antoine Bethea's got a good chance to play. Raheem, we'll probably be a little more cautious with. He would like to play but we'll see how the week develops."
"Ben Utecht re-hurt his shoulder, the one he injured (at Oakland). We'll probably hold him out this week. If it was a playoff game, there's a good chance that he may be able to go, but we'll probably hold him out. Tim Jennings, same situation. Had just a little concussion episode. I think he's going to be fine. But we're going to probably be cautious and hold him out this week."
Wide receiver Anthony Gonzalez missed most of the Houston game with a sprained foot. The injury was not initially considered to be serious.
"Gonzo wants to play. The doctors think he'll be able to play. We'll see how he practices. We would like him to play. Again, we'll be cautious with him. But we'll see how the end of the week goes," the Colts coach said.
Harrison, meanwhile, could be closer to playing than he has been since the first Jacksonville game on Oct. 22.
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According to recent statements by Colts team president Bill Polian, the left knee of the former Pro Bowl receiver has healed and now the big question concerns his stamina and ability to play a full game without risking additional medical complications.
"I think how practice goes will determine (how much, if any, playing time he will see against Tennessee). He wants to get into the practice routine. He's been running and feeling good. So we'll see what happens. If he's able to practice and go, we'd love to get him some plays," Dungy said.
"But as I said the other day, if he doesn't (play this week) it's not like being Anthony Gonzalez off a six-week layoff or somebody who's not as well versed in our offense."
The news on Diem had a new wrinkle Monday when it was disclosed that the Colts' offensive right tackle had undergone arthroscopic surgery on his knee recently. The procedure was considered a success and rehabilitation has gone as well as can be expected.
"Ryan is making progress. We'll probably hold him out. But, again, it's the type of thing if he had to go this week, he probably would be able to. He's really progressing well from the surgery," Dungy said. "He had his knee scoped and he's doing fine. We rested it for a number of weeks. It just didn't get as good as we'd hoped. We did the scope and he's doing really well. Again, I think (he) would be able to play this week if we needed him."
Addai should start against Tennessee but his playing time will most likely be limited. He was injured in the first quarter of the Houston game and saw little work after that, although he did contribute a two-yard touchdown run in the second quarter.
"Joseph actually did fine. He got hit in the back, was shaken up a little bit. Our plan was we really wanted to get Kenton (Keith) and Cliff (Dawson) a little more work with the first group anyway. Had the game been a little tighter, or a game we needed, we would have put Joseph back in. But he's doing fine and will be ready to go this week," the Colts coach said.