It was a light moment in an otherwise dark round for Spieth his worst competitive score in 11 rounds at the Northern Trust Open .
Spieth three - putted from 8 feet on the last hole Thursday to card an eight - over 79 .
It was a light moment in an otherwise dark round for Spieth , who three - putted from 8 feet on the last hole Thursday to card an eight - over 79 , his worst competitive score in 11 rounds at the Northern Trust Open .