The offseason is a double-edged sword for fantasy football owners. On one hand, one of your players could wind up in a fantastic situation or get a big boost from a free agent signing. We saw it with Russell Wilson's fantasy value skyrocketing when the Seattle Seahawks acquired Jimmy Graham. But there are also moves that drain fantasy value, like when Drew Brees lost Graham or Jeff Janis becoming irrelevant when the Green Bay Packers re-signed Randall Cobb.

Fantasy owners with Ryan Mathews experienced both feelings this week. When it was reported Mathews signed a three-year deal with the Philadelphia Eagles, many were excited to see what he could do as the featured back in Chip Kelly's offense. While he has major durability concerns, Philadelphia was the perfect landing spot for Mathews to excel. As the Eagles lead back, he could have returned to top-20 fantasy value.

Then the other shoe dropped, DeMarco Murray signed a five-year deal with the Eagles the next day. The league's leading rusher in yards, touchdowns and touches in 2014 was headed to Philadelphia. In less than 24 hours, Mathews went from one of the biggest free agency winners to a secondary piece in the Eagles' running game.

Now that fantasy owners have gone through the roller coaster of the offseason highs and lows with one player, the focus turns towards what Mathews will do next season. While he will be running the ball behind an excellent offensive line and Kelly is masterful at drawing up plays to help his running backs succeed, you can't do a lot with 10-12 carries per game.

Sproles will factor into the passing game a lot and see much of the work on passing downs, while Murray is expected to see at least 18 carries per game, including goal line work. So Mathews gets the scraps of this running game, whenever Murray needs a break and Kelly wants to rotate his running backs around. Given Mathews' talent and the Eagles' offense, there is enough to remain FLEX value.