Rangers pitcher Yu Darvish may need Tommy John surgeryAn MRI on Darvish's right triceps showed a sprain of the UCL ligament the team announced.SI Staff|Share on FacebookShare on XAdd us on An MRI on Darvish's right triceps showed a sprain of the UCL ligament the team announced.Published Mar 7, 2015 | Modified Mar 7, 2015SI STAFFShare on FacebookShare on XHome/MLB