Beyeler will embark on his 10th season in Boston's organization and his first on a Major League staff. He spent the last two seasons as skipper for Triple-A Pawtucket and became the third manager to lead the PawSox to consecutive postseason appearances.
"Arnie has had a successful professional career as a player, coach and manager," Red Sox manager John Farrell said. "This allows him to bring a wealth of experience to this position."
Beyeler, 48, directed the PawSox to the Governors' Cup in 2012, marking the club's first International League championship in 28 years. Before his stint at Pawtucket, he managed Double-A Portland from 2007-10 and piloted the Sea Dogs to a pair of Eastern League playoff trips. Beyeler got his first taste at managing with the Red Sox organization's Class A Lowell affiliate in 2000-01. He also served as skipper for Class A Augusta in 2002.
Beyeler spent three seasons from 2003-05 managing the Rangers' Class A affiliate. He also served as hitting coach for the Padres' Double-A Mobile club in 2006.
An infielder by trade, Beyeler spent six seasons in the Tigers' farm system, climbing as high as Triple-A in 1991. He joins a reconstructed coaching staff in Boston that includes a new manager in Farrell, as well as pitching coach Juan Nieves, third-base coach Brian Butterfield and bench coach Torey Lovullo.