That would mean Grace would be the hitting coach at short-season Class A Hillsboro as initially planned. However, if Blanco makes the team, Grace will serve as assistant hitting coach.
With Blanco set to be on the roster for the two-game series against the Dodgers, Grace will fill the role. The team will make a final determination on the situation prior to the March 31 U.S. opener against the Giants.
Grace played for the D-backs from 2001-03, and he was a television broadcaster for them from 2004-12.
Steve Gilbert is a reporter for MLB.com. Read his blog, Inside the D-backs, and follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.