Injured Marine Captain Eric McElvenny came back from Afghanistan, recovering from a below knee amputation, with a goal set to run an Ironman competition. He's now going for the world record for an amputee with zero sign of stopping. McElvenny discusses his return from injury, how he looked at staying positive, and what goals he has for the future beyond sport. Twitter: @EricMcElvenny

Former umpire Al Clark officiated for over 30 years, calling three thousand games, two All-Star games, seven playoff games, and two World Series. The son of a former sportswriter, Clark was a mainstay for several historical MLB moments. Clark has co-authored his autography, “Called Out But Safe: A Baseball Umpire’s Journey,” in which he chronicles his life in baseball, as well as some of challenges to his integrity, including switching airplane tickets in 2001 which led to his dismissal as an umpire, as well as his 2004 conviction for mail order fraud stemming from signing multiple memorabilia statements of authenticity for collectables that were never used in games he officiated. After serving 120 days in jail for his crime, Clark talks about trying to rebuild his life, as well as the lessons he’s learn along the way.