Original: Beginning in 1997 the Jim Thorpe Trophy was presented by the Jim Thorpe Association, with the winner determined by a "vote of NFLPA representatives".
Simplified: The award winner is given with the Jim Thorpe Trophy (different from the collegiate football's Jim Thorpe Award). Beginning in 1997 the Jim Thorpe Trophy was given by the Jim Thorpe Association, with the winner determined by a "vote of NFLPA representatives".