There is a lot of money to be shared in the NFL. It often goes to the truly elite players who are then expected to pay back their teams with outstanding performances on the field.A number of players who receive big paydays are unable to deliver on their end of the bargain. There are numerous examples of this around the league. Some believe that the latest might be Deebo Samuel.Deebo Samuel finally came to an agreement on an extension with the San Francisco 49ers. They have agreed on a three-year contract extension worth $73.5 million with $58 million guarenteed. Some worry it may be too much money to give a dual-threat receiver.Samuel was forced to virtually work as a running back and receiver in the 2021 NFL season. While it helped his stats tremendously and made him deserving of a bigger contract, it also put irreversible strain on his body.ESPN@espnBreaking: The 49ers are giving Deebo Samuel a three-year extension worth up to $73.5M, including $58.1M guaranteed, sources tell @AdamSchefter.98901011Breaking: The 49ers are giving Deebo Samuel a three-year extension worth up to $73.5M, including $58.1M guaranteed, sources tell @AdamSchefter. https://t.co/YujvblUACAMany worry that the 49ers will not see the true value of the money given to Samuel. There are a number of examples in the past where a wide receiver has earned a huge contract, only to bomb after signing it.Every contract carries a risk, but wide receivers are more prone to dips in performance than almost any other position.On that note, let's discuss four NFL receivers who failed dramatically after signing a huge contract.#1 Randall Cobb ($40 million deal with the Green Bay Packers)Green Bay Packers v Kansas City ChiefsIn 2015, Randall Cobb was set to hit the open market. He was the best WR available in the NFL at the time.He was sensational with the Green Bay Packers, where he formed a strong partnership with Aaron Rodgers. The Wisconsin franchise elected to stop him hitting free agency by signing him to a $40 million deal.Cobb turned down more lucrative deals elsewhere to sign with the Packers who quickly began to wish that he hadn't.Cobb’s performance levels dropped through the floor. He never posted another 1,000 receiving yards in a season again, and he never returned to the Pro Bowl.Cobb scored 12 touchdowns in the final year of his rookie deal in Green Bay. The weight of $40 million must have dragged Cobb down as he slipped to six touchdowns the following season. This was the most he ever registered in a single campaign ever again. His contract became a millstone around the Packers' neck.Cobb spent four more years in Green Bay, before signing with the Dallas Cowboys as a free agent.#2 Amari Cooper ($100 million deal with the Dallas Cowboys)Dallas Cowboys v Minnesota VikingsAmari Cooper shone as an NFL rookie with the Las Vegas Raiders before his career appeared to take a downward spiral.Yet, upon being traded to the Dallas Cowboys, the wide receiver began to shine in the NFL once more.His ability to score touchdowns was admired in Dallas. The impact he had on the 2018 season after arriving near the trade deadline was palpable.In 2019, he had a career year, posting 1,189 receiving yards and scoring eight touchdowns. He didn’t miss a single game and was the Cowboys’ primary receiving option.A five-year deal worth $100 million was thrown in his direction, and he gladly signed it.The Cowboys were convinced they had spent wise money, yet just two years later, he was out of Dallas.Cooper’s performances didn’t necessarily spiral out of control. He still scored five and eight touchdowns respectively in his two remaining seasons with the Cowboys. His play, however, was that of a middle receiver, not one being paid $100 million.He began to be targeted less and less frequently by Dak Prescott, and Cooper's contract put the Cowboys in a really difficult cap position.Eventually, the Cleveland Browns took him off their hands in a trade that saw them give up fifth and sixth round picks. This showed just how far Cooper’s value had fallen.