By Matt Audilet Current Masters leader Scottie Scheffler has cruised through the first three rounds at Augusta National — but an arrant tee shot on the 18th hole provided his first real struggle of the tournament. Pulling his driver well left on the final hole, it took several minutes to find Scheffler’s tee shot deep in the fairway-side brush. After about 10 minutes of deliberation with a PGA Tour rules official, the 25-year-old Texan dropped his ball two club lengths right into the pine straw. Even after taking this penalty stroke, Scheffler had a tough angle into the difficult 18th-hole gre…