Scottie Scheffler is finally ruffled at the PGA Championship, while Xander Schauffele and Collin Morikawa exchange birdie blows to share the lead heading into a Sunday showdown

ISABEL BALDWIN AT VALHALLA: If the events of Friday morning couldn't rattle Scheffler, then a change of caddie surely wouldn't. Yet, Schauffele and co. were left breathing a sigh of relief.