A third-round draft pick from Wisconsin in 2001, Rabach limped off the field Saturday morning at McDaniel College.
"Once the swelling goes down, we should be able to figure out how long I'm going to be out," Abney said. "I was doing pretty well and it's kind of frustrating to be hurt because I'm never hurt."
"Abney is banged up, so that's obviously going to hurt a little bit with his development," Ravens coach Brian Billick said. "He will be back when he can be back."
TRAINING ROOM: Rookie tight end Brett Pierce sprained his left ankle and left practice. Wide receiver Travis Taylor (groin), cornerback Fred Weary (quadriceps), quarterback Anthony Wright (shoulder), linebacker Peter Boulware (knee), defensive tackle Matt Zielinski (knee), tight end Trent Smith (leg), Abney and Sams didn't practice.
SINGLED OUT: Billick criticized the offensive line for allowing four sacks, including two missed blitz protections when starter Kyle Boller was in the game.
"We made some mistakes, some dumb mental errors that put the quarterbacks in some awkward situations," Billick said. "A little bit disappointing because I know the things we saw and called they knew better."
DEBUTS: Rookie defensive end Dwan Edwards, a second-round draft pick, registered three tackles in his NFL debut.
"Dwan was outstanding," Billick said. "We saw all of the things that drew us to Dwan in terms of his physicality and his motor."
Rookie outside linebacker Roderick Green (fifth-round pick) had three tackles in his first game and pressed the pocket on pass rushes.
"I didn't get that jittery feeling, no butterflies," Green said. "It was like it was a college game, just a different atmosphere. I used what I have: speed, strength and athletic ability."
PRACTICE MOVED: The Ravens hurriedly shifted their afternoon practice to their new indoor training facility in Owings Mills due to inclement weather caused by Tropical Storm Charley. It was closed to the general public.