The Philadelphia Eagles are coming off of a 2018 campaign in which they won nine games, snuck into the playoffs, upset the Chicago Bears in the Wild Card Round and then fell to the New Orleans Saints in the Divisional Round.

For the second straight year, Carson Wentz was not able to finish the season, and Nick Foles took over in his stead.

But now, going into 2019, the Eagles will no longer have Foles in reserve, as he signed with the Jacksonville Jaguars in free agency, meaning that if Wentz gets hurt again, Philadelphia will be in some deep trouble.

But if Wentz is able to stay healthy? The Eagles could have one of the best offenses in the NFL.

Still, there are some things Philly needs to work out this summer.

So, here are the three Eagles players with the most to gain in training camp.

3. Sidney Jones

Sidney Jones, Eagles

The Eagles' defense is not exactly stout, and their cornerback situation is a big reason why.

Ronald Darby has been unable to stay healthy since joining Philadelphia in 2017, and the rest of the Eagles' cornerbacks seem to be a bunch of relatively evenly-matched guys competing to get on the field.

This past year, Jalen Mills, Rasul Douglas and Avonte Maddox saw the bulk of the playing time in Darby's absence, but the man the Eagles may have the highest hopes for at the cornerback position aside from Darby is Sidney Jones.

Jones is entering his third season and was a second-round pick of Philly back in 2017. He suffered a torn Achilles during his Pro Day that year, which has certainly limited him, but it has gotten to a point where Jones may be running out of chances.

If he can't beat out Mills, Douglas and Maddox for playing time, the future will be very murky for Jones.

2. JJ Arcega-Whiteside

JJ Arcega-Whiteside
Ezra Shaw/Getty Images

The Eagles' passing game is absolutely loaded, featuring Alshon Jeffery, DeSean Jackson and Nelson Agholor, not to mention tight end Zach Ertz. But Philadelphia still used a second-round pick on JJ Arcega-Whiteside, an indication that the Eagles think he can be something special.

As a matter of fact, there was some talk over the offseason that the Eagles could trade Agholor in order to clear room for Arcega-Whiteside, but that did not happen.

At 6-foot-3 and 221 pounds, Arcega-Whiteside not only has good size, but solid speed, as well. He also has some fine collegiate production under his belt, as he is coming off of a senior campaign at Stanford in which he hauled in 63 receptions for 1,059 yards and 14 touchdowns.

Still, as far as his rookie year is concerned, Arcega-Whiteside is facing an uphill battle, as he has three wide outs in front of him, and Ertz caught 116 passes in 2018.

The 22-year-old will really need to show out this summer to earn a significant role.

1. Miles Sanders

Miles Sanders

The Eagles may have traded for Jordan Howard, but the general feeling is that they view incoming rookie Miles Sanders as the running back of the future.

Philly picked up Sanders in the second round of the draft, a selection that garnered rave reviews thanks to Sanders' breakout junior campaign at Penn State in which he racked up 1,274 yards and nine touchdowns.

With Howard being a north-south runner, Sanders should be a great change-of-pace back in the Eagles' system.

Of course, Sanders will be batting with guys like Josh Adams and Corey Clement for touches, so he will need to prove himself in training camp in order to win over Doug Pederson and the rest of the coaching staff.