Throw in Russell Henley and Scottie Scheffler, and Sunday is shaping up as a thriller to conclude the PGA Tour season with more than one cup in the conversation. In a FedEx Cup finale in which no one started with an edge in points or shots, it comes down to those five players separated by four shots, with Cameron Young (71) six behind.

World No. 1 Scottie Scheffler entered Friday's second round of the Tour Championship in prime position, but now has work to do if he wants another FedEx Cup.

Scheffler, and the Tour Championship by its nature, opened the door for all of this. But only four shots back, feeling like he’s centimeters off from a tournament-shifting round, Scheffler is still right there. And despite the frustrations, he knows it.