Johnny Manziel's rookie season is over in Cleveland and Ameriica's most polarizing quarterback had a debut tour to forget.

Johnny Manziel's Season is Over Due to Hamstring Injury

The Browns first round draft pick spent most of the season solidly behind Brian Hoyer, and struggled mightily in his only two starts. He finished the year with only 175 passing yards to go with zero passing touchdowns and three turnovers.

To Manziel's credit, the 24-year-old was brutally honest when assessing his own performance. Speaking to the Cleveland Plain Dealer, Manziel didn't mince words and promised to commit himself to improving in the offseason.

However, though Manziel displayed a healthy dose of self-introspection, he also believed his days in Cleveland should not be numbered.

"I don't think it'd be fair to give up on somebody after seven quarters of football," he said, per ESPN.com. Manziel also refused to apologize for his much imitated -- and derided -- dollar signs gesture.

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If Manziel wants to be the starter in Cleveland in 2015, he really will have to work for it. Although Hoyer is a free agent this winter, the Browns are expected to "explore all options" at quarterback in the offseason, according to Pro Football Talk.