Lucas Herbert was "pissed" about not making the International Presidents Cup squad, but was hopeful of securing an early spot in the Masters.
However, his Friday at the Australian PGA Championship put the latter in jeopardy.
Following an opening 72 in Brisbane, the 26-year-old Aussie "twinged" his back on the range before Round 2. He took anti-inflammatory tablets and labored through 10 holes. However, taking his physiotherapist's advice, Herbert withdrew to prevent the threat of a severe, long-term injury.
"I tried everything I could to get going," Herbert said afterward. "I really wanted to keep playing and try and finish and make the cut and work my way up on the weekend.