Thomas Diamond has been put on the disabled list by the Oklahoma Redhawks, with a strained shoulder. 

A.J. Murray has been promoted to Oklahoma, in would could potentially be a relatively short stay, if he keeps pitching well and Eddie Guardado continues to struggle.

No word at this time as to how serious the shoulder injury to Diamond is, but given that this is someone who was thought to be on the short-list of reliever candidates for the Rangers, it is something worth keeping an eye on.