In and , Claus served as one of the MLB Red Sox' two advance scouts (with Dana LeVangie). Claus' and LeVangie's scouting reports were credited with helping Boston win the 2007 American League title and 2007 World Series. Following the season, which saw Boston fall in Game 7 of the 2008 American League Championship Series, Claus left the professional baseball ranks to become the assistant baseball coach of Jacksonville University of Jacksonville, Florida. After spending the 2009 season in that post, he rejoined Boston as a member of its international scouting group on November 11, 2009, as the club's Latin American scouting coordinator and international cross-checker. In , the Red Sox promoted him to global scouting supervisor.