SURPRISE, Ariz. -- Rangers pitcher Adam Eaton is headed for the disabled list after suffering at least a strained tendon in his right middle finger in a start against his old team, the San Diego Padres, on Wednesday afternoon. The Rangers were awaiting the results of an MRI exam but manager Buck Showalter admitted, "It doesn't sound good." The Rangers, after naming R.A. Dickey as their fifth starter in the morning, were meeting Wednesday night to discuss possible options. Juan Dominguez and Edinson Volquez were sent to the Minors in the morning and one of them could be brought back....