Sanchez signed with the Philadelphia Eagles on March 29, 2014, for a 1-year, $2.25 million contract.
After spending seven full games as Nick Foles's backup, Sanchez filled-in for an injured Foles, in a Week 9 game against the Houston Texans.
Throwing for 202 yards, 2 touchdowns, and 2 interceptions, Sanchez led the Eagles to a 31–21 win.
After the game, Eagles head coach, Chip Kelly, praised Sanchez, saying, "He's a hell of a quarterback and we're excited that we got him."
Foles was later confirmed to be out for 6 to 8 weeks with a broken collarbone, meaning Sanchez would take over as the team's quarterback.

On November 10, 2014, Sanchez started his first game for the Eagles and led them in a 45–21 rout of the visiting Carolina Panthers on Monday Night Football.
Even though it was his first start at quarterback since December 2012, Sanchez notched two touchdowns as he threw for 332 yards—the fourth highest total in his NFL career.
The victory also marked the first time he had ever thrown for more than 265 yards without an interception.
Sanchez followed this with a 53–20 loss against  Green Bay, where he threw for 346 yards and 2 touchdowns, but was also intercepted twice and lost 2 fumbles.
Sanchez came back with 2 consecutive wins, a 43–24 rout of the Titans where he threw for 300 yards in his third consecutive start, and a 33–10 win against the Cowboys on Thanksgiving, where he logged 207 yards and a touchdown as well as 28 rushing yards and a score.
With the Eagles at a 9–3 record, and his record as a starter at 3–1, the Eagles looked poised to win the NFC East, but after 3 consecutive losses and playoff elimination, he finished the 2014 season with a 4–4 record as the Eagles starting quarterback.
In 9 games and 8 starts, he threw for 2,418 yards, 14 touchdowns, 11 INTs, and a 64.0 completion percentage, while rushing for 87 yards and 1 touchdown, with a career-high 88.4 passer rating.
Sanchez signed with the Philadelphia Eagles on March 29, 2014, for a 1-year, $2.25 million contract. After spending seven full games as Nick Foles's backup, Sanchez filled-in for an injured Foles, in a Week 9 game against the Houston Texans. Throwing for 202 yards, 2 touchdowns, and 2 interceptions, Sanchez led the Eagles to a 31–21 win. After the game, Eagles head coach, Chip Kelly, praised Sanchez, saying, "He's a hell of a quarterback and we're excited that we got him." Foles was later confirmed to be out for 6 to 8 weeks with a broken collarbone, meaning Sanchez would take over as the team's quarterback.
On November 10, 2014, Sanchez started his first game for the Eagles and led them in a 45–21 rout of the visiting Carolina Panthers on Monday Night Football. Even though it was his first start at quarterback since December 2012, Sanchez notched two touchdowns as he threw for 332 yards—the fourth highest total in his NFL career. The victory also marked the first time he had ever thrown for more than 265 yards without an interception. Sanchez followed this with a 53–20 loss against  Green Bay, where he threw for 346 yards and 2 touchdowns, but was also intercepted twice and lost 2 fumbles. Sanchez came back with 2 consecutive wins, a 43–24 rout of the Titans where he threw for 300 yards in his third consecutive start, and a 33–10 win against the Cowboys on Thanksgiving, where he logged 207 yards and a touchdown as well as 28 rushing yards and a score. With the Eagles at a 9–3 record, and his record as a starter at 3–1, the Eagles looked poised to win the NFC East, but after 3 consecutive losses and playoff elimination, he finished the 2014 season with a 4–4 record as the Eagles starting quarterback. In 9 games and 8 starts, he threw for 2,418 yards, 14 touchdowns, 11 INTs, and a 64.0 completion percentage, while rushing for 87 yards and 1 touchdown, with a career-high 88.4 passer rating.
Mark Sanchez