Ariel Martinez had a three-run homer among his three hits as the Nippon Ham Fighters beat the Orix Buffaloes 5-1 on Saturday to extend their winning streak to four games. Martinez broke open a two-run game with his 13th home run in the fifth inning off Ryuhei Sotani (6-10) at Es Con Field Hokkaido outside Sapporo. Takayuki Kato (9-7) pitched seven innings of one-run ball for his career-high ninth win. Chusei Mannami’s RBI double got Nippon Ham on the board in the second. Among Saturday’s other games, the second-place Fighters trimmed the SoftBank Hawks’ Pacific League lead to seven games. The …