Barry, who will work third base in the All-Star Game, called games in the 2005 and '06 editions of the Arizona Fall League. Carapazza, who will man right field at the All-Star Game, was in the AFL in 2006.
Tichenor will get the left-field assignment in the All-Star Game, and he worked at the Arizona Fall League level in 2005. Nelson, the first-base umpire, worked the AFL all the way back in 1996.
Spencer Fordin is a reporter for MLB.com This story was not subject to the approval of Major League Baseball or its clubs.