Hayato Terahara was examined at a hospital in Fukuoka today and diagnosed with a minor strain in his left intercostal muscles. He will not be allowed to throw for about two to three weeks. His rehab will begin on June 1 at the Saitozaki training facilities.
Terahara left his start against the Yomiuri Giants on the 29th with pain in his left side.
Source: Nikkan Sports 5/31/2013