Miami Dolphins receiver Tyree Kiel tweeted quote, if that 12 year old really 12, my son not playing football, these kids built different. Other people on social media are speculating Johnson's age with one person writing. "I demand Jeremiah Johnson's birth certificate and not the I am 12 kind from bench warmers" The youngster is five foot 11, 198 pounds according to a Twitter account belonging to him. It also states that he's eligible for college in 2027.