Robert MacIntyre (back) withdraws from BMW Championship

(Photo credit: Chris Day/The Commercial Appeal / USA TODAY NETWORK)Robert MacIntyre cited lower back pain in withdrawing midway through the third round of the BMW Championship on Saturday in Castle Rock, Colo.

The PGA Tour rookie from Scotland had bogeyed two holes on the front nine and was 1-over par for the tournament when he withdrew.

McIntyre, 28, entered the penultimate event in the FedEx Cup playoffs in 12th plac