It appeared that catcher Russell Martin applied the tag on Bruce just in time before his foot slid across the plate. Manager Bryan Price argued the call by plate umpire and crew chief Gary Cederstrom and used a manager's challenge.
Following a review of one minute and 40 seconds, Cederstrom's call was confirmed.
The Reds were unable to add more runs in the top of the eighth, making the would-be Bruce run an extra sting. Pittsburgh tied the game in the bottom half on a home run by Andrew McCutchen.
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.