Foles was really only successful in one year under Chip. He was pretty blah his second year before he got hurt.
So in reality, he's had like one and a half really good seasons in the NFL - the 27/2 season under Chip and then the SB run in 2017.
In 2013 the Eagles were 3-5 when Foles took over as QB. He led them to a 7-1 record over the last 8 games of the season and they made the playoffs. The Eagles went 10-6 and lost by 2 points to the Saints in the 1st round
In 2014 he led the Eagles to a 5-2 record prior to getting hurt. Sanchez finished the season and failed to get the Eagles in the playoffs.
In 2015 (his only bad year) he struggled through 11 games under Jeff Fisher.
In 2016 he looked good when he got to play with the Chiefs but he was the back up to Alex Smith
In 2017 he went 2-1 to end the regular season after Wentz got hurt. The one loss was the last game of the season and Sudfield finished the game because it was meaningless. He then won 3 straight playoff games to win a SB.
In 2018 he went 1-1 to start the season and then the Eagles struggled under Wentz and were sitting at 6-7 when he took over. He won the last 3 regular season games which were the equivalent of playoff games and then 1 the first playoff game on the road against the Bears. Lost to the Saints in a game they may have won if Jeffery does not allow the ball to go through his hands for an int.
So, since 2013 he is 18-5 in the regular season as a starter for the Eagles (under 2 different coaching staffs) and 4-1 as a starter in the playoffs. Again, what has Teddy Bridgewater done?