Oakland Raiders RB Doug Martin could challenge RB Marshawn Lynch for starting running back duties, in the opinion of The Athletic’s Vic Tafur. Martin looks quick and has shown burst at organized team activities so far.

Free-agent WR Brandon Marshall (Giants) is signing a one-year deal with the Seattle Seahawks Tuesday, May 29, according to a source. Financial terms were not disclosed.

New York Jets WR Devin Smith (shoulder) and S Marcus Maye (ankle) are expected to be healthy for the start of training camp, according to head coach Todd Bowles. Neither are expected to participate in organized team activities or minicamp, however.

Carolina Panthers C Ryan Kalil missed most of last season with a neck and shoulder injury, but he looks healthier than he has ‘in a while’ and ‘moved around well in sled and loose-ball drills’ Tuesday, May 29.

Los Angeles Chargers OG Forrest Lamp (knee), DL Corey Liuget (undisclosed), WR Mike Williams (back) and OL Donavon Clark (knee) have yet to participate in OTAs.

New York Giants WR Odell Beckham Jr. (ankle) is ‘pretty close’ to being cleared from last year’s season-ending ankle injury, according to head coach Pat Shurmur.

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Carolina Panthers WR Curtis Samuel (ankle) was able to participate ‘a little bit’ during team drills on Tuesday, May 29. Samuel is recovering from a broken bone and ligament damage in his left ankle as a rookie last season.

Carolina Panthers RB Christian McCaffrey estimates he has ‘gained five pounds of good muscle’ this offseason, according to Bill Voth of Panthers.com.

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New York Giants SS Landon Collins (forearm) participated in some seven-on-seven drills Tuesday, May 29, and head coach Pat Shurmur is hopeful Collins will be cleared in time for training camp.

Free-agent CB Channing Stribling (49ers) signed with the Indianapolis Colts Tuesday, May 29, on an undisclosed deal. S Michael Cirino (undisclosed) was waived/injured.