Roki Sasaki’s highly anticipated rookie season has taken another disappointing turn. The Dodgers placed Sasaki on the 15-day injured list with a right shoulder impingement on Tuesday prior to their 11-1 loss to the Athletics.

He told the team his arm was sore after his last start in which he pitched on five days rest for the first time in the majors. Sasaki threw four innings and gave up five runs on 61 pitches Friday at Arizona.