After a bicep injury saw him withdraw from a Tim Tszyu title showdown last March, former unified welterweight world champion Keith Thurman (30-1, 22 KOs) ends a three-year layoff when returning midweek vs. Australia's Brock Jarvis (22-1, 20 KOs) in Sydney. His first foray at 154lbs, how much does the 36-year-old have left?