A look at the most impactful football free agents of all time:
1. DE Reggie White, 1993 Green Bay Packers.
White stunned the NFL by choosing Green Bay after a whirlwind tour in the first offseason of unfettered free agency. His arrival at age 32 signaled a new era for the Packers, who hadn't found much success since the Vince Lombardi teams of the 1960s. White teamed with Brett Favre for a long run of success that included a win over the Patriots in Super Bowl 31. He was enshrined in the Pro Football Hall of Fame in 2006.
2. QB Peyton Manning, 2012 Denver Broncos.
Manning was coming off neck fusion surgery that sidelined him in 2011 when the Colts released him so they could turn their team over to rookie Andrew Luck. Despite the uncertainty over his health, Manning was courted by several teams and chose the Broncos. He set numerous passing records in Denver and led the Broncos to two Super Bowls, losing to the Seahawks in 2014 but beating the Panthers two years later in the final game of his storied career.
3. QB Drew Brees, 2006 New Orleans Saints.
Brees hit the open market at age 27 after he sustained a serious injury to his throwing shoulder in the 2005 season finale. The Chargers turned to Philip Rivers, whom they had acquired in a draft-day trade in 2004, and Brees became the rare young QB to get to test free agency. He chose New Orleans, which itself was making a comeback from Hurricane Katrina. The Saints won their only Super Bowl in 2010, over the Colts. Last season, Brees surpassed Favre for most career completions.
4. DB Deion Sanders, 1994 San Francisco 49ers, 1995 Dallas Cowboys.
After five seasons with the Atlanta Falcons, Sanders went to San Francisco and helped the 49ers win the Super Bowl over the San Diego Chargers. Then he promptly left for Dallas in 1995 and helped lead the Cowboys to a Super Bowl victory over the Pittsburgh Steelers. Also a "prime time" kick returner, his stay in Dallas also included three first-team All-Pro honors, and Sanders was inducted into the Pro Football Hall of Fame in 2011.
5. TE Shannon Sharpe, 2000, Baltimore Ravens.
After winning back-to-back Super Bowl rings in Denver, Sharpe went to the Ravens and promptly won another. He had a 96-yard touchdown catch in the AFC championship game. In his two seasons in Baltimore, Sharpe broke tight end records for career catches, yards and touchdowns, all marks that were previously held by the man who signed him, ex-Ravens general manager Ozzie Newsome. Sharpe was inducted into the Pro Football Hall of Fame in 2011.
6. DB Charles Woodson, 2006 Green Bay Packers.
Woodson was considered one of the biggest risks to hit the open market because he hadn't played a full season in four years and only played in six games during his final season in Oakland. The Packers were his only suitors and he rewarded them with a career comeback that included NFL Defensive Player of the Year honors in 2009 and a Super Bowl ring after the 2010 season.
7. QB Kurt Warner, 2005, Arizona Cardinals.
Not only did Warner go from grocery clerk to NFL MVP and Super Bowl champ while orchestrating the "Greatest Show on Turf" in St. Louis, he had another career comeback in him with the Cardinals. After starting 3-12 in Arizona and getting benched for Matt Leinart, he won back his starting job and led the Cardinals to an improbable appearance in Super Bowl 43, where they lost 27-23 to the Steelers. Enshrined in the Hall of Fame in 2017.
8. QB Rich Gannon, 1999, Oakland Raiders.
Not much was expected of the 34-year-old journeyman when he joined a middling Raiders team and its young head coach, Jon Gruden. But Gannon flourished with his fourth NFL team, making four consecutive Pro Bowls, two All-Pro teams and three trips to the playoffs. He was the league's MVP in 2002 at age 37 and led the Raiders to Super Bowl 37 against Tampa Bay.
9. WR Jerry Rice, 2001, Oakland Raiders.
Although he was in the twilight of his incredible career when crossed the bay at age 39, Rice posted two more 1,000-yard receiving seasons after leaving the 49ers, finishing with an NFL record 14 such years. The Raiders' last taste of glory came with Rice. In 2001, they lost the infamous "Tuck Rule" game against Tom Brady and the Patriots, and a year later they made it to the Super Bowl, where they lost to Tampa Bay.
10. K Adam Vinatieri, 2006 Indianapolis Colts.
The only player to score 1,000 points with two franchises, Vinatieri won three Super Bowls in his decade in New England, then another in Indy. The 46-year-old kicker is the NFL's oldest active player. Last season, he broke Morten Andersen's league record for field goals made and now has 690. He's the league's all-time scoring leader with 2,600 points and his 32 career playoff games are second behind former teammate Tom Brady.
10a. RB Curtis Martin, 1998, New York Jets.
A special category for this one because Martin was a restricted free agent. In his second season as Jets coach, Bill Parcells stunned the NFL when he signed his former franchise running back in New England away from the Patriots with a $36 million deal, parting with first- and third-round draft picks. Martin helped the Jets reach the AFC championship in his first season in New York and won the NFL rushing title in 2004 at age 31. Enshrined in the Hall of Fame in 2012.
DB Rod Woodson, 1998 Ravens
C Kevin Mawae 1998 Jets
WR Ed McCaffrey, 1995 Broncos
DL Simeon Rice, 2001 Buccaneers
LB James Farrior, 2002 Steelers
RB Priest Holmes, 2001 Chiefs
G Steve Hutchinson, 2006 Vikings
LB Mike Vrabel, 2001 Patriots
LB Ken Norton Jr., 1994 49ers
QB Brett Favre, 2009 Vikings
CB Troy Vincent, 2006 Eagles
QB Jake Delhomme, 2003 Panthers
QB Brad Johnson, 2001 Buccaneers
LB Bryce Paul, 1995 Bills
LB London Fletcher, 2007 Redskins
WR Plaxico Burress, 2005 Giants
S Tim McDonald, 1993 49ers.
LB Hardy Nickerson, 1993 Buccaneers
LB Keven Greene, 1993 Steelers, 1996 Panthers, 1997 49ers, 1998 Panthers
DT La'Roi Glover, 2002 Cowboys.
DT Justin Smith, 2008 49ers.
WR Keenan McCardell, 1996 Jaguars, 2002 Buccaneers