Cubs' Darvish exits rehab after one inning
Righty seeks MRI exam after hurling 19 pitches for South Bend
Yu Darvish's stay in South Bend will be very short, even by rehabbing big leaguers' standards.The Cubs right-hander lasted just one inning in his latest attempt to return to a mound, throwing 19 pitches before exiting with a trainer before the start of the second inning in Class A South