Jordan Spieth captured the golf world's imagination in 2015. In the year he turned 22, Spieth won two major championships and finished runner-up in another.Since then, though, it hasn't been a straight line toward all-time greatne s for Spieth. He's won one more major, but he hasn't won a PGA tournament since 2017. That's not to say Spieth has fallen off a cliff, but he enters the 2020 Masters...