Conor McGregor Tweets His Retirement

UFC star Conor McGregor  tweeted Tuesday that he has "decided to retire young."

The tweet was posted one week after Joao Carvalho died from injuries suffered during a fight earlier this month that was attended by McGregor.

McGregor, 27, is scheduled to fight Nate Diaz at UFC 200 on July 9. The fight would be a rematch of their bout from earlier this year, when Diaz upset McGregor at UFC 196.

McGregor, who was ringside at Carvalho's fight in Dublin, Ireland, posted a message last week to his Facebook account, writing "To see a young man doing what he loves, competing for a chance at a better life, and then to have it taken away is truly heartbreaking."