5 Chelsea Players Whose Stock Tumbled in 2014/15 Premier League Season

Chelsea may well be Premier League champions, but there are players in Jose Mourinho's squad who will look back on 2014/15 and mark it as one to forget.

For every scintillating performance from Eden Hazard, there was a player who left his manager frustrated.

For every goal scored by Diego Costa, there was a team-mate who failed in front of goal.

Chelsea have one of the strongest squads in the Premier League with some of the most valuable talent, but whose value took a hit over the course of the season? Which players were being carried by their team-mates?

Read on as Bleacher Report looks at Chelsea's five most disappointing players of the past year.

Ramires

Paul Gilham/Getty Images

Injury and a subsequent lack of playing time had a major impact on Ramires' 2014/15 campaign.

The Brazilian hasn't looked like himself for the past couple of seasons, seeming to have peaked in 2011/12, when he was so influential in Chelsea's run to the Champions League final.

The team has evolved since then, but Ramires hasn't. He's been left behind, and now it's difficult to see where he fits in.

Ramires lacks the defensive acumen to challenge Nemanja Matic in defensive midfield, while his passing isn't good enough to compete with Cesc Fabregas.

Now, with the dynamic talents of Eden Hazard, Willian and Oscar, Ramires has slipped further down the pecking order.

He showed glimpses of his ability in 2014/15, but overall, it was a season that confirmed his time is up at Stamford Bridge.

John Obi Mikel

Jamie McDonald/Getty Images

John Obi Mikel should change his nickname to Teflon, as his consistently bad form just doesn't seem to stick.

Every summer for the past several years we've spoken of Mikel's time being up at Chelsea, yet every season he remains.

For a player who has been at the club for almost a decade, it speaks volumes that he is still a favourite among Chelsea fans.

Since joining from Lyn Oslo in 2006, he's been a squad player at best—and an expensive one at that.

Mikel was injured for long spells in 2014/15, which meant his reputation took even more of a tumble as he was largely forgotten.

Ruben Loftus-Cheek is emerging in his position, too, which can only be bad news for the Nigerian.

Juan Cuadrado

Ian Walton/Getty Images

Juan Cuadrado arrived at Stamford Bridge in January with a considerable reputation.

He was supposed to do a number things, namely challenge Willian on the right side of midfield and replace Andre Schurrle.

The Colombian did neither, and his only achievement was frustrating Chelsea fans.

Cuadrado was a major disappointment, regardless of Jose Mourinho's request that he be given time to settle in England after his move from Serie A.

Had he shown hints of promise for next term, there would be room for optimism. But Cuadrado produced so little that he is beginning to look like an expensive mistake.

Fiorentina were laughing all the way to the bank when they cashed the £23 million cheque Chelsea gave them for Cuadrado.

Right now, he doesn't look like he's worth a tenth of that.

Filipe Luis

Clive Rose/Getty Images

When he joined from Atletico Madrid last summer, Filipe Luis was supposed to end Chelsea's left-back woes.

Ashley Cole had not long departed the club, which left Jose Mourinho with just Cesar Azpilicueta—a right-back—at his disposal.

Fast-forward 12 months and Azpilicueta remains the top left-back at Chelsea, with Luis having watched much of a title-winning campaign from the sidelines.

Azpilicueta has been in excellent form, and it's meant Luis has struggled to make the impact we expected from him.

Luis was billed as one of the world's best left-backs, but now he's not even the best in west London.

Oscar

Jamie McDonald/Getty Images

Is there a more frustrating player at Chelsea than Oscar?

We know how talented the Brazilian is. He's demonstrated that in his three seasons at Stamford Bridge. The only problem has been that his talent only lasts for the first six months of each season.

Come Christmas, Oscar disappears. It happened again this season.

Oscar recently won the Chelsea Goal of the Year award for his effort against Queens Park Rangers in November, a sublime finish with the outside of his boot that curled around a helpless Rob Green in goal.

Those moments get fans on their feet, win matches and fill newspaper columns with rightful praise.

But then Oscar's dismal displays against the likes of Watford in the FA Cup—when he was substituted at half-time—remind us that his moments of magic earlier in the season are nothing more than a false dawn.

If Chelsea are to win the Champions League, they'll need their big names firing all season.

There's an argument to suggest that isn't the case in the Premier League, given the format, but Champions League football is much different.

To be successful, teams need to win games from start to finish. Drawing isn't good enough, as Chelsea realised against Paris Saint-Germain.

To win games in the latter stages of the Champions League, every side must rely on their stars. For Chelsea, that includes Oscar.

He was missing in the vital moments of 2014/15.

Garry Hayes is Bleacher Report's lead Chelsea correspondent. All quotes were obtained firsthand unless otherwise noted. Follow him on Twitter @garryhayes.