Tatsuya Imai developed discomfort in his right shoulder after a start against Ni-gun Yakult on April 25. He was scratched from his next start on May 13 as a precaution. Imai had problems with his right shoulder during spring camp in February, but not in the same area. Still, the Seibu Lions are being cautious about his current condition.
Source: Daily Sports 5/12/2017