Free-Agent Tracker

Detroit Lions quarterback Matthew Stafford (9) throws a pass while pressured by Dallas Cowboys defensive end Anthony Spencer (93) during the NFL week 18 NFC Wild Card postseason football game against the Dallas Cowboys on Sunday, Jan. 4, 2015 in Arlington, Texas. The Cowboys won the game 24-20. (AP Photo/Paul Spinelli)

Washington Redskins tight end Jordan Reed (86) gets tackled by Dallas Cowboys outside linebacker Cameron Lawrence (53) and Dallas Cowboys outside linebacker Bruce Carter (54) as he catches a third quarter pass for a gain of 6 yards during the NFL week 17 regular season football game against the Dallas Cowboys on Sunday, Dec. 28, 2014 in Landover, Md. The Cowboys won the game 44-17. (AP Photo/Paul Spinelli)

Dallas Cowboys offensive tackle Jermey Parnell sets up to block against the Green Bay Packers during an NFL divisional playoff football game on Sunday, Jan. 11, 2015 in Green Bay, Wis. The Packers won the game, 26-21. (AP Photo/G. Newman Lowrance)

Washington Redskins quarterback Robert Griffin III (10) is sacked by Dallas Cowboys defensive tackle Nick Hayden (96) and defensive end George Selvie (99) during the second half of an NFL football game in Landover, Md., Sunday, Dec. 28, 2014. (AP Photo/Alex Brandon)

Dallas Cowboys tackle Darrion Weems (75) sits on the bench during the second half of a preseason NFL football game, Saturday, Aug. 24, 2013, in Arlington, Texas. (AP Photo/Sharon Ellman)

Dallas Cowboys defensive back Sterling Moore (26) tackles Philadelphia Eagles wide receiver Riley Cooper (14) during an NFL football game at Lincoln Financial Field on Sunday, December 14, 2014 in Philadelphia, Pennsylvania. The Cowboys won 38-27. (AP Photo/Aaron M. Sprecher)

Dallas Cowboys tackle Doug Free (68) is seen in action during an NFL football game against the Philadelphia Eagles at Lincoln Financial Field on Sunday, December 14, 2014 in Philadelphia, Pennsylvania. The Cowboys won 38-27. (AP Photo/Aaron M. Sprecher)

Dallas Cowboys receiver Cole Beasley (11) runs after a catch for a 24 yard touchdown during an NFL football game against the Indianapolis Colts on Sunday, December 21, 2014 at AT&T Stadium in Arlington, Texas. The Cowboys defeated the Colts, 42-7. (AP Photo/James D Smith)

Dallas Cowboys linebacker Justin Durant (52) stops Washington Redskins running back Ray Helu during an NFL game against the Washington Redskins at AT&T Stadium on October 27, 2014. The Redskins defeated the Cowboys 20-17 in Week 8. (AP Photo/Kevin Terrell)

Detroit Lions wide receiver Golden Tate (15) catches a pass and gets tackled by Dallas Cowboys outside linebacker Bruce Carter (54) with about two minutes left in the fourth quarter during the NFL week 18 NFC Wild Card postseason football game against the Dallas Cowboys on Sunday, Jan. 4, 2015 in Arlington, Texas. The Cowboys won the game 24-20. (AP Photo/Paul Spinelli)

Dallas Cowboys wide receiver Dez Bryant (88) reaches up to grab a touchdown pass over Indianapolis Colts cornerback Greg Toler (28) during the first half of an NFL football game, Sunday, Dec. 21, 2014, in Arlington, Texas. (AP Photo/Tim Sharp)

Dallas Cowboys running back DeMarco Murray (29) runs upfield during an NFL Wild Card Playoff game against the Detroit Lions on January 4, 2015 at AT&T Stadium. The Cowboys defeated the Lions 24-20 in the NFC Wild Card Game. (AP Photo/Kevin Terrell)

Dallas Cowboys running back Lance Dunbar (25) runs after a catch during an NFL football game against the Arizona Cardinals on Sunday, November 2, 2014 at AT&T Stadium in Arlington, Texas. The Cardinals defeated the Cowboys, 28-17. (AP Photo/James D Smith)

Dallas Cowboys defensive back C.J. Spillman (37) tackles Detroit Lions wide receiver Jeremy Ross (12) during the second half of an NFL wildcard playoff football game, Sunday, Jan. 4, 2015, in Arlington, Texas. (AP Photo/Tony Gutierrez)

Dallas Cowboys tackle Tony Hills (67) celebrates the win during an NFL Wild Card playoff football game between the Detroit Lions and the Dallas Cowboys , Sunday January 4, 2015, in Arlington, TX. (AP Photo/Tom Hauck)

Dallas Cowboys' George Selvie (99) tries to tackle Philadelphia Eagles' Mark Sanchez (3) during the second half of an NFL football game, Sunday, Dec. 14, 2014, in Philadelphia. (AP Photo/Matt Rourke)

Dallas Cowboys defensive tackle Henry Melton (69) during an NFL football game against the Washington Redskins on Monday, October 27, 2014 at AT&T Stadium in Arlington, Texas. The Redskins defeated the Cowboys in overtime, 20-17. (AP Photo/James D Smith)

Dallas Cowboys receiver Dwayne Harris runs for yardage during a week eight NFL football game against the Washington Redskins on Monday, Oct. 27, 2014 in Arlington, Texas. The Redskins won in overtime, 20-17. (AP Photo/G. Newman Lowrance)

Dallas Cowboys fullback Tyler Clutts (44) runs into the end zone to score on a one-yard touchdown pass during the first half of an NFL divisional playoff football game against the Green Bay Packers Sunday, Jan. 11, 2015, in Green Bay, Wis. (AP Photo/Matt Ludtke)

Detroit Lions defensive tackle Ndamukong Suh (90) rushes against Dallas Cowboys guard Ronald Leary (65) during an NFL wild card playoff football game at AT&T Stadium on Sunday, January 4, 2015 in Arlington, Texas. Dallas won 24-20. (AP Photo/Aaron M. Sprecher)

Dallas Cowboys punter Chris Jones (6) punts the football during a Week 14 NFL football game against the Chicago Bears in Chicago, Illinois on Thursday, December 4, 2014. The Cowboys defeated the Bears 41-28. (AP Photo/Scott Boehm)

Buffalo Bills linebacker Keith Rivers (56) runs during a week 1 NFL football game against the Chicago Bears in Chicago, Illinois on Sunday, September 7, 2014. The Bills defeated the Bears 23-20 in overtime. (AP Photo/Scott Boehm)

Detroit Lions fullback Jed Collins (45) prepares to slide during the first half of an NFL football game against the Miami Dolphins in Detroit, Sunday, Nov. 9, 2014. (AP Photo/Carlos Osorio)

Minnesota Vikings middle linebacker Jasper Brinkley (54) tackles Detroit Lions running back Joique Bell (35) during the second half of an NFL football game Sunday, Oct. 12, 2014, in Minneapolis. (AP Photo/Ann Heisenfelt)

Oakland Raiders running back Darren McFadden (20) during an NFL regular season game against the Buffalo Bills on Sunday, Dec. 21, 2014 in Oakland, Calif. The Raiders won, 26-24. (AP Photo/Ric Tapia)

San Diego Chargers linebacker Andrew Gachkar makes a tackle on Denver Broncos tight end Julius Thomas during a week eight NFL football game against the Denver Broncos on Thursday, Oct. 23, 2014 in Denver. The Broncos won the game, 35-21. (AP Photo/G. Newman Lowrance)

Detroit Lions running back Reggie Bush (21) is tackled by New Orleans Saints cornerback Corey White (24) during an NFL football game at Ford Field in Detroit, Sunday, Oct. 19, 2014. (AP Photo/Rick Osentoski)

Cleveland Browns fullback Ray Agnew (48) runs the ball against Tennessee Titans safety Michael Griffin (33) in the second quarter of an NFL football game Sunday, Oct. 5, 2014, in Nashville, Tenn. (AP Photo/Wade Payne)