The Eagles finished with 2,715 rushing yards in 2021, breaking a franchise record that stood since 1949.Yes, there were 17 games this past season for the first time and thats way past the 12 the league played back when an 11-1 championship team rushed for just over 100 yards le s but you get the point, Nick Siriannis running game was really effective in 2021.The offensive line and Jalen Hurts ability as the so-called plus-one in the ground game get most of the credit for that and rightfully so but all of the Eagles running backs were effective at times when they got an opportunity starting with RB1 Miles Sanders down to the practice-squad elevation of Jason Huntley in Week 18.Yet there is still great uncertainty at the position for a number of reasons, most notably that a potential second-contract is now in the conversation for Sanders, a player who looks good on the surface but has some significant flaws as you start to peel game the onion Willie Mays Jersey of his game.Then comes the valuation of the position in the NFL as a whole where its believed that a second deal for big money will present diminishing returns with only the biggest and most dominant names cashing in. Overall, Sanders, who will turn 25 on May 1, remained a bit of a disappointment in 2021 despite rushing for 754 yards at 5.5 yards per clip, both second on the team to Hurts Shaun Anderson Jersey and the latter number superlative for a RB. The third-year pro, however, mi sed five games with an a sortment of injuries that included an ankle, a quad, and finally a broken hand while also failing to take the nece sary steps forward as a pa s receiver or pa s protector.As a runner, meanwhile, Sanders still leaves far too much meat on the bone that the OL provides, and still has some ball-security i sues. He also didnt hit the home runs hes become known for with his longest run of the season being 38 yards, a career-low in that category for the Penn State product.Check out more about each running back in this gallery: Miles SandersGrade: BWhat went right: Averaged 5.5 yards per carry and had was second on the team with 754 yards rushingWhat went wrong: Injuries limited him to 12 games and he did not score a touchdown.Closing thought: Entering the final year of his contract, an extension prior to the season is not warranted. Jordan HowardGrade: BWhat went right: In just seven games, he ran for 406 yards and Mike Yastrzemski Jersey three scores.What went wrong: His history of stingers popped up again and that's a concern.Closing thought: A free agent, he should return. Boston ScottGrade: BWhat went right:Sored 7 rushing touchdowns, second behind Jalen Hurts' 10.What went wrong: Nothing.Closing thought:A free agent, he should return. Kenny GainwellWhat went right: Rookie accounted for 681 total yards with six TDs.What went wrong: Had a bad fumble at end of the first half vs. Las Vegas.Closing thought: Should continue to get better in Year TwoSanders is about to enter the final year of his rookie deal but its hard to imagine anything getting done on the contract front until in-season 2022 like what happened this season with members of the 2018 draft cla s. What you can glean from Nick Siriannis Week 1 and early-season philosophy as a whole is that hed prefer to have a bell cow teamed with a third-down back, not the committee approach the Eagles turned to out of nece sity.Veteran Jordan Howard, 27, might be more valuable to the Eagles than anyone else and another one-year deal for the veteran minimum could be in the offing.Scroll to ContinueHoward, Blank Jersey who finished with 406 yards on 86 carries with three TDs, admitted he didnt receive much interest around the league last year in free agency before returning to Philadelphia where he spent the first seven games on the practice squad until being pre sed into action.Howards size and north-south running style are tailor-made for the Eagles powerful offensive line but persistent stinger i sues cropped up again and the Eagles could look to turn the page if they are able to get a younger option on Days 2 or 3 in the draft.Boston Scott (87-373, seven TDs) turns 27 in late April and is a coaching-staff favorite.He should be tendered as a restricted free agent and serves as one of the better RB3s in the NFL with a nose for Abiatal Avelino Jersey the goal line.MORE:Kenny Gainwell, 22, has a tremendous upside as a pa s-catching back out of the backfield so much so that by the second half of the season the Eagles had him working both with the RB and WR rooms at times.Gainwell will be the guy as a receiving back moving forward into his second NFL campaign after finishing the first with 291 yards on 68 rushes and adding 33 receptions for an additional 253 with six combined TDs.Huntley was elevated from the practice squad for the meaningle s Week 18 finale and showed off both his speed and kick return ability with the latter being the path to contribution especially with the struggles of Jalen Reagor and Quez Watkins in that role.STAY: Miles Sanders (for 2022, no extension), Boston Scott, Kenny Gainwell, Jason HuntleyGO: Jordan Howard