BOSTON — Long, bushy beards have become the unifying trademark of the 2013 Boston Red Sox, but the most valuable player of their American League Championship Series victory stands out for more than his pitching.

The series M.V.P., the cleanshaven closer Koji Uehara, was given a pass on the team’s unofficial pro-beard policy because most of his teammates thought he was incapable of growing one.

But that is hardly the case. Well before the Red Sox’ shaggy faces entered the national consciousness, Uehara (pronounced way-HA-ra) was a longstanding member of the antirazor brigade.

Until January, when he shaved it off on Japanese national television, Uehara had one of the most famous beards in Japan: light, Fu Manchu-style scruff with a wraparound beard connecting to his sideburns. It was considered ugly and brutish by many of his friends and countrymen, but he wore it defiantly for several years after coming to the United States in 2009.