The Jacksonville Jaguars held two practices today at Ferrell Fields, installing new elements into the sessions, including short-yardage, goal-line and the four-minute offense, as rookies and veterans begin to think ahead to Friday's preseason opener against the Carolina Panthers.

Head coach Tom Coughlin said the development of the squad will begin as players start to show more of what they can do. "The deeper we go into the playbook and the deeper we go into our training camp, that'll start to decide itself. You get yourself into a situation - offense, defense and special teams - and people have to keep up."

Although several players are slowly working back into the practice regimen following injuries, such as Carnell Lake, Jimmy Smith, Damon Jones and Keenan McCardell, Coughlin wouldn't say who will play in Friday's game. But he added, "It's important for everybody to play, even if it's a limited number of snaps. The thing I look at is the numbers in that area - if they're down, it doesn't help us any."

The Jaguars will practice at 3:40 p.m. Tuesday at Ferrell Fields. Coughlin will be available following the practice. Players will be available during their lunch period, from 11:30 a.m. to 12:15 p.m. at the Radisson Riverwalk Hotel.

CRAIG MILLER RETIRES

Safety Craig Miller retired today, four days after suffering a neck stinger in practice last Thursday. Miller had been taken by ambulance from the practice field to Baptist Medical Center after being injured, although preliminary X-rays and an MRI on his neck were negative.

Because Miller played in the NFL Europe League earlier this year and was one of 11 NFLEL exemptions, he cannot be replaced on the Jaguars' roster. The limit is now 90 players.

Miller played in four games last season, starting twice in nickel defenses and making three tackles.