5) Nicholas Petit-Frere
Last year, Nicholas Petit-Frere had a major opportunity on his hands when he was named the Tennessee Titans' starting right tackle, making him responsible for freeing up Derrick Henry. Alas, the Titans shockingly collapsed, losing their last seven games and missing the playoffs.
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And then he was caught betting on other sports inside Titans territory, meaning a six-game ban. He says he did not know, but he should have known better.