Derrick May doubled in the go-ahead run in the third inning Sunday and as the Chiba Lotte Marines beat Seibu 5-3 and snapped the Lions' nine-game winning streak.
With the front-running Lions ahead 3-1, Masato Kosaka, Kazuya Fukuura and Kiyoshi Hatsushiba had consecutive hits for extra bases to drive in a run at Akita Prefectural Stadium. May then followed with a two-run double for the lead Lotte never relinquished.
Hiroyuki Kobayashi (4-3), on in relief of starter Takashi Kawai held Seibu to just two hits and struck out four in three scoreless innings of relief for the win as Lotte halted a six-game losing skid.