After his disastrous final round at The Masters on Sunday, Shane Lowry said he didn’t have it in him to celebrate his good friend, Rory McIlroy, who won the tournament for the second consecutive year.

For the second consecutive year, Shane Lowry contended at the Masters only to fall short on Sunday and watch his good friend Rory McIlroy slip on the green jacket. But unlike last year, when Lowry ...