Four-time major champion Rory McIlroy crashed out of the U.S. Open after two rounds, carding a double bogey on his 36th hole of the tournamnet to fall below the cut line. McIlroy was on the verge of a huge comeback after posting a 77 in his first round, but he fell apart on the third green with a stunning four-putt before his costly mistake at No. 9.

McIlroy addressed his result on Twitter Sunday - and he's reading his mentions.

Disappointing week to say the least. Fighting my swing a bit at the minute but working hard to get back on track. Happy Father's Day!

— Rory McIlroy (@McIlroyRory) June 19, 2016

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Best of luck to @ShaneLowryGolf today... Bring that trophy back to these shores and give Brendan the best Father's Day gift of all! ☘🏆

— Rory McIlroy (@McIlroyRory) June 19, 2016