Xander Schauffele dealing with nagging back injury

Xander Schauffele said he is playing in this week's Sentry Tournament of Champions despite an ailing back.

The injury forced him to withdraw from Wednesday's pro-am but he teed off Thursday and carded a 3-under 70 in the opening round in Kapalua, Hawaii.

The seven-time PGA Tour winner and World No. 6 told reporters he isn't sure what the injury is and he has not yet had an MRI.

Schauffele, 29, said he dealt with the ai