The Aussie revealed the two-time British and Irish Lions skipper addressed the squad to announce the news personally via Cardiff Blues boss John Mulvhill reveals what went on in the days that led to Sam Warburton’s retirement — WalesOnline – Home

https://welshbizuk.wordpress.com/2018/07/31/cardiff-blues-boss-john-mulvhill-reveals-what-went-on-in-the-days-that-led-to-sam-warburtons-retirement/