Johnny Manziel had what has to be considered a disappointing rookie campaign. He lost the starting quarterback battle during training camp to Brian Hoyer, and he sat out for most of the season while Hoyer led the Browns to playoff contention. Once he finally assumed the starting gig, Manziel was ineffective before eventually suffering a season-ending injury.

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Many have questioned whether Manziel worked hard enough to succeed, and some have expressed doubts that he possesses the work ethic and desire to become a quality starting quarterback in the pro ranks, where his trademark improvisational skills cannot carry him to success by themselves.

According to CBS Sports, former Cleveland general manager Phil Savage believes that the offense may be to blame. Savage said leading up to the 2014 NFL Draft that any team that drafted Manziel needed to shift their scheme to suit his talents, and he thinks Cleveland failed to do that.

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"I don't know all the intimate details of how it went down, but to me Manziel needed to go a place where they would shape the offense around him and build elements into it that he could perform," Savage said. "If you were going to pour him into a more traditional style of offense, then it was going to be a waste of his ability because his ability is to play backyard football.

"You have to create circumstances where almost artificially you give him those same sorts of pictures and same sorts of reads."

Browns owner Jimmy Haslam has not said that Manziel is the future of the franchise, saying instead that he wants a quarterback that can lead the team to a championship.

"He's a first-round pick, so there was obvious ability there," Savage, who was the Browns general manager from 2005-08, said of Manziel. "I mean it's not over with yet, but wow. Based on how the season ended, there's more questions now than on the Thursday night they drafted him."