The Yomiuri Giants came from behind on Friday to preserve their Central League lead when Gakuto Wakabayshi singled in the winning run in a 3-2 walk-off victory over the DeNA BayStars. The Giants tied it 2-2 in the eighth inning at Tokyo Dome on Yoshihiro Maru’s solo homer and scored the winning run in the ninth thanks to a Takumi Oshiro leadoff double and Wakabayashi’s one-out game-winner. The Giants’ sixth-straight win kept them one game ahead of the Hiroshima Carp, who came from behind to beat the Yakult Swallows 4-3. Yomiuri opened the scoring in the second on Kazuma Okamoto’s league-leadin…