The Washington Redskins aren't the only team making moves to improve their roster heading into the 2015 season.

While the free agency frenzy from the first week has certainly cooled off, all of the movement that took place drastically changed the landscape of the league.

To help you track all of the major moves made by the 2015 Redskins opponents, here's a comprehensive look, courtesy of FedEx Tracking.

Dallas Cowboys

Key Addition: Greg Hardy comes to Dallas with big-time pass rushing capabilities, along with uncertainty. During the 2013 season, the Mississippi product recorded a career-high 15 sacks as a member of the Carolina Panthers. Hardy missed the final 15 games of the 2014 season, though, with pending legal troubles related to a domestic violence-related incident. Hardy may be suspended for part of the upcoming season.

Key Subtraction: Anytime you lose a longtime starting running back, it's a big deal. But losing the league's leading rusher after a career year could be a huge problem. After recording 1,845 rushing yards and 13 touchdowns during the 2014 season, DeMarco Murray decided the Eagles were the right team for him moving forward, signing a contract with Philadelphia during the offseason.

Philadelphia EaglesKey Addition: Let's keep it up with Murray. While he found success behind the league's highest rated offensive line during the 2014 season, Murray will now look to attack defenses in Chip Kelly's high-speed offense.

Key Subtraction: To make room for Murray – and Ryan Mathews as well – the Eagles traded away the versatile LeSean McCoy to the Bills. In his six seasons in Philadelphia, McCoy ran for 6,792 yards and 44 touchdowns along with almost 3,000 receiving yards and 10 receiving touchdowns.

*New York Giants *Key Addition: General manager Jerry Reese said during the NFL Combine that the Giants were looking to a versatile, pass-catching weapon to the backfield. With former Patriot running back Shane Vereen – who has more than 1,000 receiving yards in 42 games – the Giants get just that.

Key Subtraction: While his numbers declined over the years, defensive end Mathias Kiwanuka was one of the few Giants to win both Super Bowl matchups against the Patriots. Kiwanuka could possibly re-sign, but for now he remains a free agent.

Tampa Bay BuccaneersKey Addition: After four seasons with the Chicago Bears in which he started 52 games, safety Chris Conte now calls Tampa Bay home. The California product recorded 231 tackles with 21 passes defensed and nine interceptions during that span.

Key Subtraction: Perhaps the biggest free agent quarterback signing in 2014, Josh McCown was released shortly after the season ended. He started 11 games in Tampa Bay, throwing for 2,206 yards and 11 touchdowns. The Buccaneers are projected to take a quarterback with the No. 1-overall pick in this month's draft.

Carolina PanthersKey Addition: The Panthers have high hopes for tackle Michael Oher as they look to ensure quarterback Cam Newton's jersey stays clean. Oher is a former first-round pick with the Ravens who spent last season with the Titans.

Key Subtraction: Aside from wide receiver Steve Smith, no Panther may have been more recognizable for the franchise over the years than running back DeAngelo Williams. In nine seasons in Carolina, Williams recorded 6,846 rushing yards and 46 touchdowns with a Pro Bowl appearance. He's now a member of the Pittsburgh Steelers.

New Orleans SaintsKey Addition: Saints offensive players are asked to do a lot of different things in Pete Carmichael's offense. That's what makes the signing of running back C.J. Spiller so much sense. Spiller amassed more than 4,500 yards and 18 touchdowns in Buffalo, and averages five yards per carry.  

Key Subtraction: It doesn't get much bigger – both in production and impact – than Jimmy Graham. Despite playing tight end, Graham put up top receiver numbers over the last few seasons, as the Miami product has nearly 5,000 yards and 51 touchdowns in five NFL seasons. He was traded to the Seattle Seahawks in the crazy first couple days of free agency, however.

Atlanta FalconsKey Addition: Justin Durant brings a veteran presence to a defensive unit that struggled during the 2014 season. In eight NFL seasons, the Hampton product has recorded at least 40 tackles seven times.

Biggest Subtraction: While Harry Douglas was the Falcons' third wide receiver when both Roddy White and Julio Jones were healthy, he still played an integral part in Atlanta's offense. Douglas recorded 3,130 yards and eight touchdowns as a Falcon, and during the 2013 had his first 1,000-yard season. He now is a member of the Tennessee Titans.

Chicago BearsKey Addition: While he admitted the Redskins were a possibility too, safety Antrel Rolle ultimately decided to sign with the Bears after five seasons with the Giants. The Miami product has appeared in all but one regular-season game over the last seven years.

Key Subtraction: Like several other teams on this list, the Bears lost one of the best receiving weapons, as Brandon Marshall was traded to the Jets. The five-time Pro Bowler is closing in on 10,000 career receiving yards.

St. Louis Rams

Key Addition: The Rams have themselves a new quarterback in Nick Foles. Acquired in a trade that sent Sam Bradford to Philadelphia, Foles is hoping to replicate the success he experienced during the 2013 season when he threw 27 touchdowns to just two interceptions.

Key Subtraction: The Rams had high hopes for Jake Long after acquiring him before the 2013 season, but the Michigan product simply couldn't stay healthy. In both seasons in St. Louis, Long ended the season on Injured Reserve. Long remains a free agent for any team willing to give him a chance at a comeback.

Miami DolphinsKey Addition: The Dolphins landed the prized free agent in this year's class with defensive tackle Ndamukong Suh. The former second-overall pick has crushed the competition over the years, developing into one of the best run stuffers and recording 36 sacks as well.

Key Subtraction: In order to make room for Suh, the Dolphins did not keep longtime starter Randy Starks. The Maryland product made 96 starts with 111 appearances in seven years with the Dolphins, and has taken his talents to the Cleveland Browns in 2015.

New York JetsKey Addition: This one is tough considering the team acquired both Darrelle Revis and Brandon Marshall. But we're going with Marshall because the Jets haven't had a 1,000-yard receiver since 2007. Marshall, meanwhile, has recorded six 1,000-yard seasons during that time.

Key Subtraction: The Percy Harvin experiment didn't work out very well for the Jets, as the shifty wideout recorded just 350 yards and one touchdown after an in-season trade. He has landed with the division rival Buffalo Bills and former Jets head coach Rex Ryan.

New England PatriotsKey Addition: The Patriots have been in search for a second tight end to complement Rob Gronkowski for quite some time now. They're hoping they've found their answer in Scott Chandler, a longtime member of the Buffalo Bills. In each of the last four seasons, Chandler has recorded at least 385 receiving yards and two touchdowns.

Key Subtraction: Revis may have only played one season with the Patriots, but he's one of the reasons the organization now has four Super Bowl trophies to its credit. Revis started every game for New England last season, recording 47 tackles with 14 passes defensed. He chose to return to the Jets over the Patriots this offseason.

Buffalo BillsKey Addition: LeSean McCoy could strike big on Rex Ryan's team, as the defensive-minded coach has been known to be run-heavy on offense over the years.

Key Subtraction: It's difficult to predict what sort of impact Kiko Alonso could have had for the Bills, but if you're to go off of one season than the Oregon product could end up becoming one of the best linebackers in the league. During the 2013 season, Alonzo recorded a team-high 159 tackles as a rookie. He missed all of last season with injury.

RELATED LINKS:
-- Here Are The Offseason Workout Dates For The Redskins
-- 2015 Redskins Free Agency Journal

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