Dominic Smith runs to third base after hitting a walk-off grand slamEdward M. Pio Roda/Getty Images Tap Here To Add Us Weekly As A Trusted Source Add as a preferred source on Google Dominic Smith's electric walk-off grand slam capped off an exciting win for the Atlanta Braves - but the moment means so much more than just another tally in the win column. After Smith sent Braves fans home happy on Sunday, March 29, after a win against the Kansas City Royals, the designated hitter revealed that he lost his mother to cancer less than two weeks prior.