And it has certainly contributed to Adam Silver being the most popular sports commissioner in America today. 00?BSTIt’s one of the quirks of the English language that, if you didn’t know any better, you could imagine that the words sportsmanship and gamesmanship were synonyms. Chris Christie rips 'liar' Eli Manning: 'He got caught' in fake memorabilia scheme | Sport | The Guardian. ofessional soccer in the US took its first tentative steps with the foundation of the NPSL.