Conor McGregor's long-awaited return to the Octagon ended in disappointment Saturday after the Irish star suffered a knee injury just 1:09 into the opening round of his welterweight main event against Max Holloway at UFC 329 in Las Vegas. Making his first UFC appearance in more than five years, McGregor received a thunderous ovation from a sellout crowd. But the highly anticipated comeback was over almost as soon as it began. Moments after the opening bell, McGregor launched a flying left roundh