Yu Darvish ended a minor league rehab start early on Sunday and requested an MRI after the Chicago Cubs' right-hander again experienced discomfort in his pitching elbow.Darvish, who has been on the disabled list since May 23 with right triceps tendinitis, tossed 19 pitches in the first inning for Single-A South Bend but asked to come out during the second-inning warm-up.The 32-year-old Japanese said the pain was similar to what occurred in his last minor league start on June 25, after which he was diagnosed with right elbow inflammation."During the warm-up of the next inning, I felt somethi…READ FULL ARTICLE