CARDIFF, United Kingdom (AFP)–British and Irish Lions captain Sam Warburton has retired from rugby union at the age of 29, admitting defeat in his battle against chronic injury. Flanker Warburton, who won 74 Wales caps and captained his country a record 49 times, was forced to sit out last season after undergoing knee and neck surgery. “Unfortunately, after a long period of rest and rehabilitation the decision to retire from rugby has been made with my […]