Webb, who is dealing with a hamstring injury, hasn't played in a preseason game since Aug. 22, 2013. If he doesn't suit up for Saturday's game against the Washington Redskins, it will mark the eighth straight preseason game that Webb has missed. There is no certainty Webb would be ready for the preseason finale, which is in nine days.
Even though not having Webb has become a common occurrence now, Ravens defensive coordinator Dean Pees said he's "absolutely" concerned about all the time that his starting cornerback has missed.
"It's certainly a concern," Pees said. "I'd be fooling if I told you that I didn't think it was a concern."
Last season, Webb didn't play in any preseason games because of a lower back and groin injury. He then missed three of the first four games in the regular season and struggled for most of 2014, when he graded out as the No. 78 cornerback by Pro Football Focus.
This year, it was a bad start to training camp when Webb failed the team's conditioning test. Then, he injured his hamstring on Aug. 10 when he was beaten deep by rookie receiver Darren Waller.
Webb is still penciled in as the starter on the Ravens' latest unofficial depth chart, but he has been far from dependable. He has missed 13 games over the past three seasons.
"It's not his fault," Pees said of Webb's latest injury. "He's trying to do what he can to rehab and get ready to go."
In Webb's absence, Rashaan Melvin has played well and was making a run at Webb's starting job. But Melvin missed Tuesday's practice with an undisclosed injury, although coach John Harbaugh said he didn't think it was serious.
"I want guys out there practicing, so we can see where they are and know where they are," Pees said. "I hope we get him out here in the next week or so."
If Webb isn't back soon, it would represent another lost preseason for him.