Shaquem Griffin, first one-handed player in NFL history, announces retirement

Linebacker Shaquem Griffin, who made history as the first one-handed NFL player, announced his retirement Wednesday. His twin brother, Shaquill Griffin, plays for the Jacksonville Jaguars. 

The 27-year-old explained his decision to leave pro football in a piece in the Players Tribune, writing that it is "time for me to execute my Plan A." 

For Griffin, that plan includes "doing something" that would "make a positive impact in the world."