Andrew Putnam (back) pulls out of John Deere Classic

Andrew Putnam (back) pulls out of John Deere Classic

Andrew Putnam withdrew from the John Deere Classic midway through Friday's second round due to a back injury.Putnam, 36, started on the back nine and carded a double-bogey at the par-4 18th hole be

Andrew Putnam withdrew from the John Deere Classic midway through Friday’s second round due to a back injury.

Putnam, 36, started on the back nine and carded a double-bogey at the par-4 18th hole before pulling out.

He was 3-over for his round after opening with an even-par 71 on Thursday at TPC Deere Run in Silvis, Ill.

Putnam won his lone PGA Tour title at the 2018 Barracuda Championship. His best finish this season was a T6 at the RBC Canadian Open last month.