OWINGS MILLS, Md. -- It's not an injury issue any longer for Baltimore Ravens cornerback Lardarius Webb. In order for him to get back on the field, he has to prove to coach John Harbaugh that he's in better shape.

A lower back injury sidelined Webb for the entire preseason and the first two games of the regular season. But, after looking stiff in his first game back on Sept. 21, he was a healthy scratch for Sunday's 38-10 win over the Carolina Panthers.

The Ravens are paying Webb $205,882 per week whether he's active or not. Harbaugh said he'll have a good idea by the end of the week whether Webb will be ready to play at Indianapolis, but he won't reveal Webb's availability until Sunday.

"It could very well be this week," Harbaugh said about Webb showing improved acceleration. "I'm sure hoping this week. I want to see it this week."

With Webb out, the Ravens started Asa Jackson alongside Jimmy Smith and moved Matt Elam from strong safety to nickelback in passing situations. It's important for the Ravens to get back Webb for the Colts, who've gone with at least three wide receivers on 164 snaps (ninth-most in the NFL).

"It'll be based on how he practices and how he looks, just in terms of getting his acceleration and his burst back," Harbaugh said. "The things that everybody saw that weren't quite there. Then, he tells me that he's healthy now and he says he feels healthy. It's just a matter of that strength, quickness and burst, which should come back fast. Anybody that's ever trained, if you've been in great shape, you get back into shape pretty quickly."

When Elam covered the slot receiver, rookie third-round pick Terrence Brooks got his first defensive snaps of the season Sunday. He played 35 snaps and held up well in coverage. Harbaugh was impressed with Brooks' ball skills.

"He plays fast and has got a good sense for the ball back there," Harbaugh said. "He played well and merits more playing time."