Hirotaka Koishi is slated to start Thursday's game against the Rakuten Eagles.
Senichi Hoshino is three games away from his 1,000th managerial victory.
The Eagles' likely starters for their three game series against the Seibu Lions: Wataru Karashima (Tuesday), Takashi Kawai (Wednesday), and Kelvin Jimenez (Thursday).
Chiba Lotte Marines
Shingo Ono joined the Ichi-gun roster for workouts today. He will likely pitch during the upcoming Nippon Ham Series (May 8-10).