Masahiro Yamamoto was taken off the active roster today with a bruise on his left shin -- he took a batted ball off his left leg during his start against Nippon Ham on Wednesday. The injury is not considered serious. There were already plans to give him an extended rest.
Masahiko Tanaka has decided not to go under the knife after suffering a fracture in his left collarbone during a game against Hanshin on the 12th. He will likely require two to three months for a full recovery.
Source: Sanspo 5/16/2013
Kentaro Sekimoto was taken off the active roster today with pain in his left calf. He reportedly suffered the injury during a game on the 12th.
Source: Sports Hochi 5/16/2013
Brandon Duckworth hurt his left hamstring during his start against Yokohama on Wednesday and was taken off the active roster today. The injury does not appear to be severe.
Source: Sponichi 5/16/2013