Since his retirement from the NHL two years ago, the 45-year-old Mr. Roberts has become almost legendary for his ability to train and pump up young prospects. His first disciple, Tampa Bay Lightning star Steven Stamkos, is the perfect example: He added 15 pounds of muscle after his rookie season and led the league in goals with 51 as a sophomore. Ever since, players have been lining up at Mr. Roberts’s door – 42 pro-level players are training with him this summer [including James Neal & Jordan Staal].