Jin was assured by the coach that all sports involve certain risks, and that American football isn't any more dangerous than basketball or soccer if young players are properly trained.

Todd Williams, a strength and conditioning trainer, said many American parents initially have the same concerns about their children's safety when they take up the sport.

"What they do is let the kids play flag football before they reach puberty," Williams said. "It's the same body movements, but you take away the hitting. Once kids' bodies are developed they can put on the equipment and start playing tackle football."

Jin's son, a running back, now attends training sessions twice a week－and he's a big fan of Wilson.

"Seeing these kids train brings back a lot of memories from when I was a kid and learning to play football," said the Seahawks superstar.

"Some kids told me that I'm their hero because they see that I am not a big guy, so they think maybe they can be a pro one day, too."