Thirteen years is long enough to communicate without words. Jordan Spieth and caddie Michael Greller have been doing exactly that since 2013, and on Saturday at the $20 million Truist Championship, one moment captured it all. Jordan Spieth was in the third round at Quail Hollow Club alongside Xander Schauffele on moving day. On the par-5 15th, Spieth faced a 66-foot eagle putt with a sweeping right-to-left break and rolled it in perfectly. Spiet…