Harris, baseball's all-time pinch-hit leader, was stricken with chest pains Friday, but did not suffer a heart attack as there was no heart damage. In a Saturday operation, doctors found blockages in four arteries, with one 95 percent blocked.
Harris, 45, is in his second season as the senior hitting coach at the Dodgers' Camelback Ranch-Glendale complex, working mostly with Minor League players. Harris returned to the Dodgers after serving the 2008 season as the Major League hitting instructor of the Washington Nationals.
Harris had an 18-year Major League career that included stints with the Reds, Dodgers (1989-93), Mets, Rockies Diamondbacks, Brewers, Cubs and Marlins.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.