Conor McGregor announces retirement on social media

LOS ANGELES (AP) — UFC superstar Conor McGregor announced his retirement on social media Monday night, abruptly ending his remarkable fighting career.In a post on his verified Twitter account, the former UFC featherweight and lightweight champion said: "I've decided to retire from the sport formally known as 'Mixed Martial Art' today."The post wishes his "old colleagues well going forward in competition," and says he would "join my former partners on this venture, already in retirement. Pr