Allen Park— Don't let Matt Willis' appearance on "American Ninja Warrior" fool you. "That's just the name of the show. I'm not a ninja," Willis said. The Lions wide receiver competed on the show during the NFL lockout in 2011 with his brother-in-law Genai Kerr, a two-time member of the men's Olympic water polo team. Willis didn't advance past the first round because he struggled with the wall at the end of the course, but he said he wouldn't have continued if he had for fear of injury...
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