Scott is seven shots from the lead held by Dustin Johnson but on a golf course on which he has won previously he is not without hope of a good weekend carrying him into contention.
Scott was playing his way out of the tournament at the turn but his strong late burst augurs well for the weekend especially given his impressive victory over Tiger Woods, Justin Rose, Gary Woodland and Graham DeLaet at Liberty National in 2013.
Matt Jones is 34st and Cameron Smith 66th, while Jason Day continued his disappointing run of form by missing the cut by one.
Scott and Day, however, are both guaranteed to advance to the BMW Championship next week in Chicago in which the leading 70 players in the FedEx Cup standings take part while for Smith and Jones they need a big weekend if they are to remain alive.
Johnson appears back to his best with a round of 67 to follow his opening 63 and he leads by one over Jordan Spieth while Jon Rahm, Patrick Reed, Troy Merritt and Australian Open champion Abraham Ancer are tied in 3rd place and two from the lead.
Want video tips delivered straight to your inbox? Subscribe to iseekgolf.com newsletters.