It had been reported earlier that Wallach was verbally promised a role on the Dodgers' coaching staff. The Los Angeles Times reported that Wallach had signed a new contract guaranteeing a Major League job, but that has not been confirmed by the team.
For the past two seasons, Wallach managed the club's Triple-A affiliate in Albuquerque.
Wallach's role on Mattingly's staff has not been determined, but he's likely to be third-base coach or batting coach. Wallach was batting coach in 2004 and '05, but has said he felt detached from the game in that role.
Larry Bowa was Joe Torre's third-base coach and Mattingly was the hitting coach. Bowa is under consideration for bench coach.
Torre's bench coach, Bob Schaefer, told Mattingly he would not be returning. Pitching coach Rick Honeycutt is expected to return. First-base coach Mariano Duncan was told he could seek a Major League job elsewhere, but a position somewhere in the organization would be available if he didn't find one.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.