(Reuters) - Arnold Palmer will not join in the ceremonial opening tee shots at this year's Masters due to a lingering shoulder injury, and the four-time winner at Augusta said it was time for him to give up the honor. The 86-year-old Palmer had been an honorary starter at the Masters since 2007. Well, sure, but time moves on," Palmer said from Bay Hill on Tuesday, where he hosts this week's PGA Tour stop. More...