A position-by-position look at the roster follows:

Quarterback

Number kept last season: Three

Average number kept since 2002: Three

Locks: Matt Hasselbeck, Seneca Wallace

On the bubble: David Greene, Gibran Hamdan

Longer odds: Travis Lulay

Comment - The team isn't confident it will be able to sign a desirable veteran backup. Holmgren made it clear Greene must improve to stick around. Hamdan has a broken ankle and may or may not be back in time for training camp.

Running back

Number kept last season: Five

Average number kept since 2002: Five

Locks: Shaun Alexander, Maurice Morris, Mack Strong (FB)

Looking safe: Leonard Weaver (FB)

On the bubble: David Kirtman (FB), Josh Scobey

Longer odds: Marquis Weeks, Ran Carthon, Jimmy Dixon

Comment - Weaver is approaching "lock" status, but the team will give Kirtman a chance in training camp.

Wide receiver

Number kept last season: Seven

Average number kept since 2002: Six

Locks: Darrell Jackson, Bobby Engram, Nate Burleson, Peter Warrick, D.J. Hackett

On the bubble: Maurice Mann, Ben Obomanu

Longer odds: Taco Wallace, Skyler Fulton, Tony Brown, Keenan Howry, C.J. Jones

Comment - Fulton played well in NFL Europe, but that doesn't mean much now. Mann and Obomanu seemed to enjoy strong passing camps.

Tight end

Number kept last season: Three

Average number kept since 2002: Three

Locks: Jerramy Stevens, Itula Mili

On the bubble: Will Heller

Longer odds: Brock Edwards, Matt Henshaw, Keith Willis, Mike Gomez

Comment - Stevens might not return from a knee injury until well into training camp.

Offensive line

Number kept last season: Nine

Average number kept since 2002: 8.75

Locks: Walter Jones, Floyd Womack, Robbie Tobeck, Chris Gray, Sean Locklear, Chris Spencer, Ray Willis, Tom Ashworth

Looking safe: Rob Sims

Longer odds: William Henry, Jeff Bolton, Lance Reynolds, Pat Ross

Comment - Womack's health is again a concern.

Defensive line

Number kept last season: Eight

Average number kept since 2002: Nine

Locks: Grant Wistrom, Marcus Tubbs, Chuck Darby, Bryce Fisher, Craig Terrill, Rocky Bernard, Darryl Tapp, Russell Davis

On the bubble: Joe Tafoya, Chris Cooper, Kemp Rasmussen, Jeb Huckeba

Longer odds: Robert Pollard, Darrell Wright, John Syptak

Comment - Health is a major concern on the line. Wistrom, Tubbs and Bernard are coming off surgeries and could miss the start of training camp.

Linebackers

Number kept last season: Seven

Average number kept since 2002: 7.25

Locks: Lofa Tatupu, Leroy Hill, Julian Peterson, D.D. Lewis

Looking safe: Isaiah Kacyvenski, Niko Koutouvides, Kevin Bentley

On the bubble: Cornelius Wortham

Longer odds: Lance Laury, Evan Benjamin

Comment - Tatupu, Hill and Peterson could form the strength of the defense.

Cornerbacks

Number kept last season: Four

Average number kept since 2002: 4.5

Locks: Marcus Trufant, Kelly Jennings, Kelly Herndon, Jordan Babineaux

On the bubble: Jimmy Williams

Longer odds: Gerard Ross, Reggie Austin, Lance Frazier, Kevin Hobbs

Comment - Jennings has been working opposite Trufant with the starters. Babineaux returns from shoulder surgery in August.

Safeties

Number kept last season: Four

Average number kept since 2002: Four

Locks: Michael Boulware, Ken Hamlin

Looking safe: Mike Green

On the bubble: Oliver Celestin, Shaunard Harts, Etric Pruitt

Comment - Boulware could miss some of training camp after undergoing ankle surgery. Hamlin is returning from head injuries. Green has extensive starting experience from his days in Chicago.

Specialists

Specialists kept last season: Three

Average number kept since 2002: Three

Locks: K Josh Brown, LS J.P. Darche

On the bubble: P Tom Rouen, P Ryan Plackemeier, P Gabe Lindstrom

Longer odds: K Ryan Killeen

Comment - The punting situation remains unsettled as Rouen, a veteran of 810 punts in 188 regular-season games, faces a challenge from younger prospects.