OWINGS MILLS, Md. -- Once a position of depth, defensive end has become a concern for the Baltimore Ravens a little more than two weeks into training camp.

Kapron Lewis-Moore suffered a likely season-ending Achilles' injury on Sunday, coach John Harbaugh said after practice. This injury is magnified by the fact that the Ravens lost rookie fourth-round pick Brent Urban (torn anterior cruciate ligament) for the season on July 30.

Suddenly, both players expected to rotate with defensive end Chris Canty probably won't see the field this season.

"We have tremendous depth around here. But to lose those two guys with all that potential -- and they were doing so well in camp and they definitely showed they were able to help this team win -- it's unfortunate," linebacker Terrell Suggs said. "We all know injuries are part of the game. It just sucks that it happened."

Without Lewis-Moore and Urban, the Ravens probably will turn to DeAngelo Tyson, who was Canty's backup last season. Tyson is currently listed as the No. 2 nose tackle on the depth chart.

If Tyson moves to defensive end, the Ravens would then use undrafted rookie Derrick Hopkins or Terrence Cody (on physically unable to perform list with hip injury) to back up starting nose tackle Brandon Williams, a first-year starter who only played seven games last season. Another option at defensive end is Pernell McPhee, who played that spot for his first two seasons before switching to rush outside linebacker last year.

"The next guy will be up, and we'll find a way to do it," coach John Harbaugh said. "There's always going to be injuries. You adapt, adjust and fill out your position."

Lewis-Moore was injured in a pileup during a joint practice with the San Francisco 49ers. As he laid in the middle of the field writhing in pain, players from both teams knelt and dropped their heads, including 49ers coach Jim Harbaugh.

Riding off on the cart, Lewis-Moore could be heard sobbing.

"It's a horrible feeling. I feel terrible," Suggs said. "I wish him a speedy recovery."

Lewis-Moore missed all of rookie season last year after suffering a torn ACL in his right knee in his final game in college. He generated buzz this offseason, and he just played his first NFL game three days ago when he finished with two tackles.

"It's going to be tough for him, and we'll rally around him," Harbaugh said. "He'll be back tougher than ever next year."

An hour before Lewis-Moore was injured, cornerback Asa Jackson needed to be helped off the field. Jackson, though, has a minor ankle injury, according to Harbaugh.

"He'l be out for some number of days, but it's not a major deal," Harbaugh said.