Prior to every season there is a list of fantasy football players that are expected to have productive seasons for their respective team. After four weeks of football some players have produced while others haven't. Three players in particular, who were on ESPN's Top 25 for fantasy football list, stand out as complete disappointments so far in 2015.

Philadelphia Eagles RB DeMarco Murray: Murray led the NFL in rushing last season with 1,845 yards and scored 13 touchdowns, but since signing with the Eagles Murray has only rushed for 47 yards with one touchdown. It's not only that Murray isn't producing touchdowns, but also that he is not producing with the touches he gets. Last season in Dallas, Murray averaged 4.7 yards per carry, and this season with Philadelphia he is averaging only 1.6 yards per carry. Coming into the season many thought Murray's numbers would go down, as many expected Ryan Mathews and Darren Sproles to take carries away from him. But most didn't think he would go from being the league's top rusher to a player that could sit on the bench. Murray can still salvage this season, but for most he is too risky a play and with no consistency from the Eagles offense that doesn't look likely to change any time soon.

Indianapolis Colts QB Andrew Luck: Last season Andrew Luck was one of the best fantasy quarterbacks a team could have. He threw 40 touchdowns and only had 16 interceptions. This season has started off rough for the former first round pick, as he has thrown only five touchdowns to seven interceptions. The Colts faced two strong defenses their first two games in the Jets and Bills, but other quarterbacks such as Tom Brady have produced big numbers against the Bills defense. Luck's numbers this season are not worthy of a starting quarterback, and many fantasy owners are likely very disappointed with his production. Luck can easily bounce back this season, and out of the three players mentioned, he has the best chance to do that. But it won't be Thursday night against the Texans, as Matt Hasselbeck looks likely to get his second start. Luck has won one game this season as the starting quarterback, but a separated throwing shoulder has sidelined him for the time being. After four weeks of football Luck is clearly the biggest fantasy disappointment at quarterback. The only positive for Luck fantasy owners is there are still plenty of games left on the schedule, and he can easily turn his numbers around.

Denver Broncos RB C.J. Anderson: Anderson was supposed to be the Broncos number one back, but after not producing in the first four weeks head coach Gary Kubiak has decided that he will share the starting role with Ronnie Hillman. Last week against the Minnesota Vikings, Anderson only rushed for 43 yards with no touchdowns, but Hillman was able to rush for 103 yards with a touchdown. The further the Broncos get into their schedule the less Anderson looks like a legitimate number one running back. Anderson is averaging just 2.7 yards per carry this season and he has yet to see the endzone. Many expected the third year running back to have a big season, and so far it hasn't panned out. Anderson has time to turn his season around, but he will likely see less carries each week if he doesn't start to produce. With Ronnie Hillman emerging, and Anderson losing carries, he is clearly one of the biggest disappointments in fantasy this season.