In a keynote address at the 2015 Lacrosse Convention in Baltimore, the former All-American defenseman at Syracuse and 13-year Navy SEAL said the best leadership lesson learned in military training was simple: ” Calm is contagious. ” Denver told the story of his final training exercise as a Navy SEAL, where students in training have to plan, organize and execute a mission all “under the watchful eye of the lunatic Navy SEAL instructor.”