"This is my opportunity," said Walls, a fourth-year player who's one of the team's fastest players. "I've got to show them what I can do. If they put me in that spot, I've got to go and make plays."
"I don't count the numbers, but I think I've stepped it up since minicamp."
TRAINING ROOM: Hartwell, Baxter, cornerback Fred Weary (quadriceps strain) missed practice along with tight end Trent Smith (leg), linebacker Peter Boulware (knee), quarterback Anthony Wright (shoulder) and cornerback Zach Norton (shoulder).
Weary said he was given an antibiotic and will be back when the swelling in his leg goes down.
Rookie return specialist Derek Abney missed the special-teams session after aggravating his hamstring and hopes to practice today.
Fullback Ovie Mughelli (shoulder) returned to work Tuesday.
TACKLING: Billick said the Ravens will hold a full-contact, short-yardage drill today, ratcheting up the hitting prior to Friday night's scrimmage at Scott S. Bair Stadium.
AUDIBLE: Billick on the competition at right offensive guard between Bennie Anderson and Casey Rabach: "Both are fighting their fannies off and those are big fannies, so it's quite a battle."
OFFICIAL VISIT: NFL umpire Undrey Wash will visit training camp Thursday to discuss the enforcement of pass interference becoming a major point of emphasis this season.
ANGER MANAGEMENT: Orlando Brown incurred two personal fouls in the Ravens' playoff loss to the Tennessee Titans.
He attacked defensive end Jevon Kearse in the final minutes when Kearse appeared to be choking tight end Terry Jones.
Brown drew criticism for his temper, apologized and said he has learned a difficult lesson about the need for self-control.
As for criticism that Brown contributed heavily to the end of the Ravens' season, Billick said, "They were wrong. He's made some big strides. That was a huge mistake that he learned from."
"It doesn't mean it's not going to happen again. It doesn't mean he's going to be perfect, but he's very cognizant of what that cost us."
QUICK HITS: Randy Hymes is running ahead in the race for the third wide receiver spot. He appears fully recovered from a torn anterior cruciate ligament, catching passes over Corey Fuller and Chad Williams. ... The Ravens have hosted several college coaches this week, including Maryland defensive line coach Dave Sollazzo. Plus, Chad Unitas, the son of the late Baltimore Colts quarterback legend Johnny Unitas, was at practice Tuesday.
Aaron Wilson writes for the Carroll County Times.