Professional golfer Rory McIlroy has withdrawn from the Arnold Palmer Invitational after he felt muscle spasms in his back. “While warming up in the gym this morning, I felt a small twinge in my back,” McIlroy said in a Saturday, March 7, statement. “As I started hitting balls on the range before the round, it worsened and developed into muscle spasms in my lower back.” He added, “Unfortunately, I’m not able to continue and have to withdraw. I was excited to compete this weekend. I wish the Arnold Palmer Invitational a great finish and look forward to being back next year.” McIlroy, 36, was si...

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