"I just wanted some acknowledgment, some accountability for their son's actions. He is a great kid. It really hurts me to be doing this," coach Alan Beck said.
Beck, of Roseville, says the careless helmet toss during a winning run left him with a torn Achilles tendon.
The teen's parents say they didn't even know the coach was badly injured until several games later.
"He started to limp in front of me and I said hey, what's wrong with your leg? 'You didn't hear? Your son threw the helmet, hit the ground and it bounced up and hit me in the leg,'" recalled the boy's father Joe Paris.
Beck says he is willing to forget about the lawsuit if the family just apologizes.