Usually an errant golf ball to the head nets a spectator a free autograph. For one person, it saved his life.

Last Fourth of July, 25-year-old Chris Logan went to the final round of the AT&T National at the Aronimink Golf Club in Newton Square, Pa. When PGA golfer Sean O'Hair teed off at the 18th hole, his shot went astray and hit Logan in his left temple.

When being checked out by emergency technicians, a doctor asked Logan about a lump below his throat and urged him to get it checked out. The lump turned out to be a malignant tumor on his thyroid -- and the errant golf shot ended up saving his life.

O'Hair and Logan finally met nearly one year later, Tuesday at the Waynesborough Country Club in Paoli, Pa. This time the meeting was under much different circumstances.

"We had a little battle on what to say. He hit me in the head and then helped me out with the cancer diagnosis. So that was pretty funny. He's a really nice guy, glad to finally meet him," Logan told the Philadelphia Inquirer.

O'Hair told the Inquirer that it was "something cool to be involved with."

"You feel bad about hitting him, but yet you feel good that he found out about the cancer, found it early, and got it worked on," he told the newspaper.

Logan is now cancer-free.