ORCHARD PARK, N.Y. — With most of the free-agent frenzy over, the Buffalo Bills are trying to keep one of their would-be free agents.

Receiver Lee Evans confirmed today the Bills have made him a contract offer that would prevent the five-year veteran from becoming a free agent following the 2008 season.

Evans, Buffalo's leading receiver the past two years, is in the final year of a five-year deal he signed after Buffalo selected him with the 13th overall pick in the 2004 draft.

Evans didn't talk about any details of the offer.

"We have been involved in negotiations with his agent, but per team policy, we don't discuss details," Bills spokesman Scott Berchtold said. "Our position regarding Lee has been consistent in that we want him to remain as a Buffalo Bill."

Evans, who had minor surgery on his shoulder this offseason, will likely command a salary comparable to that of Arizona receiver Larry Fitzgerald. Fitzgerald, a two-time Pro Bowler, got a four-year, $40 million contract — with $30 million guaranteed — in March.

"Lee obviously is a core player in this organization and we want Lee to be here for many years to come," Bills chief operating officer Russ Brandon said before last month's draft.

After enjoying a breakout year in 2006, when he set career highs in receptions (82) and yards (1,292), Evans saw his production slip in 2007 when he led the Bills with just 55 catches for 849 yards and five touchdowns.

Buffalo's offense certainly hasn't helped Evans. The Bills ranked 30th in the league for the second consecutive year this past season, and haven't finished better than 25th on offense since Evans arrived.

But with the addition of rookie wide receiver James Hardy, Buffalo's second-round pick, and the experience gained by running back Marshawn Lynch and quarterback Trent Edwards as rookies last season, Evans is optimistic the offense will improve.

"It can't get too much worse," he said after the Bills' first voluntary organized practice Monday. "With the talent we have on offense, we certainly have the ability to be as good as we want to be. The biggest thing for us now is to gain confidence. If we can do that, we'll be a very good offensive team."

Notes: Backup quarterback J.P. Losman practiced, but declined to talk to reporters. Losman's agent, Gary Wichard, told The Associated Press in January that his client preferred to be traded, but stressed that Losman would play out the final year of his contract if there's no deal made. ... Starting left tackle Jason Peters, punter Brian Moorman and rookie fullback Mike Viti were the only players who weren't at the workout. ... Linebacker Paul Posluszny was back on the field after a broken forearm in Week 3 last year forced him to miss the rest of his rookie season.