Tyler Gaffney (born April 20, 1991) is an American football running back for the Jacksonville Jaguars of the National Football League (NFL). He was drafted by the Carolina Panthers in the sixth round of the 2014 NFL Draft. He played college football at Stanford. He also played for the New England Patriots.
As a true freshman in 2009, Gaffney played in 12 games, rushing for 87 yards on 22 carries with a touchdown. As a sophomore in 2010, he played in 10 of 13 games, missing three games due to injury. He finished the season with 255 yards on 60 carries and four touchdowns. As a junior in 2011, he played in 13 games rushing for 449 yards on 74 carries with seven touchdowns. After spending a season playing professional baseball, he returned to the team in 2013.   Gaffney had an outstanding year in 2013. He started in 14 games finishing with 330 rushing attempts, 1709 rushing yards, and 21 rushing touchdowns.
Gaffney played three years of college baseball as an outfielder at Stanford. During the three years he hit .299/.405/.427 and eight home runs. He was drafted by the Pittsburgh Pirates in the 24th round of the 2012 Major League Baseball Draft.  He played in 38 games for the State College Spikes that year, hitting .297/.483/.441. After the season, he returned to football.
Gaffney was drafted by the Carolina Panthers with the 204th pick in the 2014 NFL Draft. While he was originally slated to compete for the third running back spot on the roster with second-year runner Kenjon Barner, on July 26, 2014, Gaffney went down with a torn lateral meniscus in his left knee during training camp. As a result of the injury, he was waived by the Panthers.
New England Patriots
On July 28, 2014, Gaffney was claimed off waivers by the New England Patriots.  On August 26, 2014, Gaffney was placed on injured reserve. Gaffney won Super Bowl XLIX with the Patriots after they defeated the defending champion Seattle Seahawks 28–24. 
The following year, Gaffney was waived by the Patriots on August 12, 2015, and was placed on injured reserve the next day. 
In order to revise Gaffney's contract, the Patriots released Gaffney on April 11, 2016; after clearing waivers, he was re-signed on April 14. 
On September 3, 2016, Gaffney was waived by the Patriots and was placed on injured reserve after clearing waivers.  On September 9, 2016, he was released from injured reserve with an injury settlement.  On October 17, 2016, he was re-signed to their practice squad and was promoted to the active roster on October 29, 2016.   On November 10, 2016, Gaffney was waived by the Patriots and was re-signed to the practice squad two days later.  
On February 5, 2017, Gaffney won his second Super Bowl championship when the Patriots won Super Bowl LI. In the game, the Patriots defeated the Atlanta Falcons by a score of 34–28 in overtime.