LOS ANGELES -- Touted Los Angeles Dodgers rookie Roki Sasaki landed on the injured list Tuesday because of right shoulder impingement, an injury similar to one he had in Japan last year. Sasaki threw four innings and gave up five runs on 61 pitches Friday at Arizona. Sasaki underwent scans on Monday's off day that revealed the problem. Roberts said he doesn't think Sasaki would spend any time in the minors. He underwent scans on Monday that revealed a right shoulder impingement.