LOS ANGELES -- The Dodgers claimed catcher Ryan Lavarnway from the Boston Red Sox and designated Drew Butera for assignment Friday as the new front office continues to tweak the fringes of the team's roster.General manager Farhan Zaidi said after tendering a contract to A.J. Ellis earlier this week that the team is considering a rotation at the catcher position, but Lavarnway, like Butera and Ellis, is a right-handed hitter.In 97 major-league games, Lavarnway, 27, is a .