Former Seahawks, as well as Dolphins linebacker, was a sensation in the college football league and his time in the NFL for being an amputee who didn't have a hand.
"The moment has arrived for me to step down from playing professional soccer," The player wrote in the blog post. "It's the right time to implement my plan A."
I'm aware of the positive impact I'm having on other people," Griffin continued. "I'm talking at universities and colleges as well as speaking to teams playing football,