Hsin-Hong Tsai, the RHP signed earlier this summer by the Chicago Cubs had his contract voided after failing his physical. Although the exact reason for why he failed his physical is unclear (bone spurs?),Tsai in his blog, stated that he is pitching without discomfort and still hopes to fulfill his dreams of playing in the US. In order for that to happen he'll need a second opinion from an ortho MD.
Also, Mariners farmhand Kuo-Hui Lo has been experiencing pain in his left wrist and may need surgery.