Denver Broncos
Where: University of Northern Colorado, Greeley, July 25.
Key newcomers: OT Blake Brockermeyer (Bears), TE Shannon Sharpe (Ravens), WR Rob Moore (Cardinals), OT Ephraim Salaam (Falcons).
Top rookies: WR Ashley Lelie, RB Clinton Portis.
Challenges: Sharpe returns and LB Bill Romanowski leaves, giving coach Mike Shanahan challenges on both sides of the ball. Return of injured WR Ed McCaffrey is vital to improvement of QB Brian Griese.
Oakland Raiders
Where: Napa Valley Marriott, Napa, Calif., July 24.
Key newcomers: DT John Parrella (Chargers), LB Bill Romanowski (Broncos), S Rod Woodson (Ravens), CB Terrance Shaw (Patriots).
Top rookies: CB Phillip Buchanon, LB Napoleon Harris.
Challenges: New coach Bill Callahan from Chicago’s South Side succeeds Jon Gruden and tries to get one more season from veterans QB Rich Gannon and WRs Jerry Rice and Tim Brown on offense while infusing new faces to shore up sagging defense.
Kansas City Chiefs
Where: Wisconsin-Rivers Falls, July 25.
Key newcomers: OT Willie Roaf (Saints), PK Morten Andersen (Giants), WR Johnnie Morton (Lions), WR Curtis Jackson (Patriots).
Top rookies: DT Ryan Sims, DT Eddie Freeman.
Challenges: Better play from QB Trent Green to complement all-purpose star Priest Holmes. Morton will help. Coach Dick Vermeil hopes rookies can improve the 23rd-ranked defense.
San Diego Chargers
Where: University of California-San Diego, La Jolla, July 25.
Key newcomers: DT Jason Fisk (Titans), C Cory Raymer (Redskins), TE Stephen Alexander (Redskins), LB Donnie Edwards (Chiefs).
Top rookies: CB Quentin Jammer, G Toniu Fonoti, WR Reche Caldwell.
Challenges: New coach Marty Schottenheimer needs to find out whether QB Drew Brees is ready to replace Doug Flutie. He’s counting a lot on additions from his former stays in Kansas City and Washington.
