NFL legend and investor says Apple's new CEO should follow the advice Steve Jobs once gave Tim Cook

Fran Tarkenton is an NFL Hall-of-Fame quarterback.

Chip Somodevilla/Getty Images

• NFL Hall of Fame quarterback Fran Tarkenton said John Ternus can learn something from Steve Jobs.
• Jobs once told Cook not to look backward when making decisions about Apple.
• Tarkenton has been an Apple investor since 2015.

The new guy who's soon to be in charge at Apple has big shoes to fill, and he can't follow in his predecessors' footsteps.

Longtime Apple investor and...