Golf greats Jack Nicklaus, left, and Arnold Palmer stand together on the first tee as they served as ceremonial starters to begin play in the 2010 Masters golf tournament.SHAUN BEST/Reuters
Arnold Palmer has had a pacemaker implanted to correct an abnormal heartbeat.
According to his website, Palmer had successful surgery Monday at the UPMC Presbyterian Hospital. The 84-year-old Palmer was to remain in the hospital overnight for observation. He is expected to be released on Tuesday.
Golf Channel earlier this year produced a three-part documentary called "Arnie," which was broadcast the week after the Masters in April. The seven-time major champion remains one of the most endearing figures in golf.
Palmer turns 85 on Sept. 10.