The remaking of the Philadelphia Eagles roster continues. After cutting Trent Cole, Todd Herremans, James Casey and Cary Williams (and doing the same with DeSean Jackson last year), head coach and top personnel man Chip Kelly has traded star running back LeSean McCoy to the Buffalo Bills for linebacker -- and former Oregon Duck -- Kiko Alonso. (Note: The trade cannot be made official until next Tuesday, per league rules, but various reporters have confirmed that it's happening.)

This is a monster of a trade involving two high-profile players, made by two high-profile coaches. Let's break it all down.

Philadelphia Eagles

McCoy led the NFL with 626 carries in his two seasons playing under Kelly. He was magnificent in 2013, averaging 5.1 yards a pop. He led the league in rushing while also finishing second in 20-plus yard runs and first in runs that resulted in a first down. McCoy's effectiveness waned a bit in 2014 as he averaged only 4.2 yards per carry, though he still managed to finish third in rushing yards, 20-plus yard runs and runs that resulted in a first down.

Without McCoy on the roster, the Eagles are down to Chris Polk and Darren Spoles as their current stable of running backs. Polk signed with the Eagles after going undrafted out of Washington in 2012, and he's carried 57 times for 270 yards and seven touchdowns in his time with the team.

Polk began taking some red-zone and third down carries from McCoy as the 2014 season went on, but he never had that big a role in the offense. Sproles, of course, came to Philadelphia via trade last offseason and made an impact as one of the NFL's top dual-threat backs.

He gained 5.8 yards per carry on his 57 totes while also adding 40 catches for an additional 387 yards, scoring six offensive touchdowns in all.

Despite the presence of Polk and Sproles, it's likely that the Eagles will go after another back in free agency and/or the draft. (Dane Brugler, for one, thinks they can find one as many as five rounds deep in this year's class.) Neither player has ever shouldered the lead ball-carrier burden for an NFL team, and Sproles will be 32 years old by the time next season starts. Even if they wind up pursuing another back, though, this move seems like a pretty big bet by Kelly that his offensive system can continually produce quality rushers and he doesn't need one as talented -- or highly-compensated -- as McCoy to find success in the running game.

The acquisition of Alonso, meanwhile, allows the linebacker to reunite with his former college coach in Kelly.

Alonso played four years at Oregon, finishing his career with 144 tackles, 21 of which stopped the opposition for a loss, as well as 3.5 sacks, six interceptions, nine passes defensed and three forced fumbles. He was one of the league's top rookies in 2013, finishing four votes shy of Jets defensive end Sheldon Richardson in Defensive Rookie of the Year voting.

Alonso had finished third in the NFL with 159 tackles in 2013, adding two sacks, four interceptions and four passes defensed. He finished the season as PFF's ninth-highest graded inside linebacker, proving particularly effective in coverage, where he graded out second-best. He also had 39 run stops, according to PFF's tracking, tied with Luke Kuechly for seventh-most among 40 inside backers that played at least half of their team's defensive snaps. He missed the entire 2014 season with a torn ACL suffered in training camp, but should be healthy in time for next season.

Though the Bills were supposedly considering moving Alonso to outside linebacker before electing to trade him, it seems likely that Alonso will slot in at inside linebacker next to Mychal Kendricks in the Eagles' 3-4 defense. Kendricks was drafted in the second round of the 2012 draft out of Cal, and he's been a mainstay in the midde of Philly's defense since they switched to the 3-4 in 2013. He's missed an average of two games a year, but still managed to pick up 201 tackles, nine sacks, three picks and 16 passes defensed in his three seasons.

Kendricks and Alonso should form one of the more formidable inside linebacker duos in the league, presuming Alonso returns to full health. They both have excellent speed and coverage skills to work the hook-to-curl zones, as well as the ability to read blocking schemes and fill running lanes in front of them. With Connor Barwin rushing the passer from the edge, the Eagles are well on their way to one of the NFL's best linebacking corps. They'll have to pick up another pass-rusher in free agency or the draft to replace the departed Trent Cole and the probably-departing Brandon Graham, but that trio gives Philly a big head start.

Apart from the on-field considerations, there is the money to consider. McCoy was scheduled to have the NFL's second-highest cap hit among all running backs next season ($10.25 million), and if the Vikings elect to move on from Adrian Peterson, it would be the highest in the league. Alonso, meanwhile, has only the 43rd-highest cap hit among inside linebackers at just under $786 thousand. Philly saves a ton of money in the trade, which has to be taken into consideration.

Grade: B/B+

A former Duck reunites with his former coach. (Getty Images)

Buffalo Bills

While the Bills added a bunch of salary in this trade, they're still in good cap position with over $22 million in space heading into the start of free agency. They can create even more space by converting some of Mario Williams' base salary into a signing bonus and pushing it into the future. They may have to do that to add some impact players, especially considering they traded this year's first-round draft pick in last offseason's Sammy Watkins deal. They missed out on "top" quarterback free agent Josh McCown, meaning they still have only the underwhelming E.J. Manuel under contract at the position.

Acquiring McCoy gives them another big-play threat to add to Watkins, as well as a back who is more of a bell-cow than either of the options Buffalo's had the last few years. McCoy's presence means the end of the C.J. Spiller Era in Buffalo, as the back himself said while he was live on NFL Network almost immediately after news of the trade broke. Spiller struggled with injuries last season, missing seven games, while his backfield mate Fred Jackson seemingly alternated healthy and injury-prone seasons in his eight years with Buffalo. Neither player ever carried more than 237 times in a single season, though, while McCoy toted it 314 and 312 times, respectively, the last two years. There should still be room for Jackson to have a role in the offense even with McCoy around, and limiting his touches should help him stay healthy.

New offensive coordinator Greg Roman -- formerly of the 49ers -- is already excited to have a new weapon to play with, and says McCoy is a good fit for his offense. "When you go back & watch him at Pitt, he can do anything," Roman said. Roman was known for his power scheme during his time with San Francisco and McCoy is more of an east-west dancer type of back, but few schemes put backs in better position to succeed than Roman's over the last few years. Motion, combination blocks, multiple tight-end sets and more should continue to be part of his play-calling arsenal, and it will be interesting to see how he reacts to having a back like McCoy who is so far superior in open space than what he's used to in the more plodding (but also more powerful) Frank Gore.

McCoy does have in excess of $25 million left on his contract over the next three seasons, but our Jason La Canfora is already reporting that McCoy and his agent, Drew Rosenhaus, could ask Buffalo for an extension or threaten to hold out. If it's tough to see how possibly being the NFL's highest-paid back could be a problem for McCoy, consider that almost none of the future money he's owed is guaranteed. Buffalo can move on from McCoy nearly cost-free after this season if they wish, even if that would seem an immense waste of resources.

Meanwhile, the Bills should still be in pretty good shape defensively, even without Alonso. They finished the 2014 season ranked second in overall defensive DVOA, first against the pass and 12th against runs. They had 45 sacks and finished fourth in Adjusted Sack Rate, and they did all that without Alonso. Jerry Hughes, who had 9.5 of those sacks, is a free agent, as are is nside linebacker Brandon Spikes. Hughes and Spikes were integral parts of last season's excellent defense, and it would be prudent for Buffalo to try to retain them.

Even if they don't, though, the core of Marcell Dareus, Kyle Williams, Mario Williams, Stephon Gilmore and Corey Graham is still in place. Dareus and Kyle Williams might be the best defensive tackle duo in the NFL, and Mario Williams continues to bring excellent pressure from the edge while also holding his own in the running game. Graham emerged as one of the league's best cover corners last season, even as he inexcplicably lost playing time in the middle of the season.

Put all those players -- and maybe Hughes and Spikes -- on a Rex Ryan defense, and you're bound to see success. Rex has a somewhat legendary ability to generate pressure out of nowhere with his complex blitzes, and he's got two excellent corners to work with just as he did during the Darrelle Revis - Antonio Cromartie days in New York. That defense will be just fine.

Grade: B+/A-

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Shady McCoy is headed to Buffalo. (Getty Images)