Darrin Muller was a coach and umpire in Britain. He twice was named Britain's Youth Coach of the Year. He umpired more than 2,250 games, including 17 national championships, two Pony World Series, the 2009 Baseball World Cup, 2010 European Championship and 2015 European Junior Championship. In 2019, he was inducted into the British Baseball Hall of Fame.
Primary Source: British Baseball Hall of Fame