Yu Darvish received an injection Thursday for a lingering nerve issue in his lower back.
Gerry Fraley of the Dallas Morning News was told by a source that Yu Darvish pitched down the stretch despite dealing with what appeared to be sciatica, a common form of lower back discomfort.
Yu Darvish racked up eight strikeouts over 5 2/3 innings in Sunday's season finale against the Angels, giving him a league-best 277 punch-outs on the season.
Yu Darvish admitted Tuesday night that he's dealing with an undisclosed physical issue.
Yu Darvish allowed two runs while striking out nine over 5 1/3 innings of a no-decision against the Astros on Tuesday.
Yu Darvish survived six walks and a HBP to hold the Rays to two runs in five innings in a victory on Thursday.
Yu Darvish struck out 10 over seven innings of one-run ball Saturday against the Athletics, but was handed a tough-luck loss.
Yu Darvish allowed only one run on four hits over seven innings against the Pirates on Monday.
Yu Darvish left Monday's start against the Pirates due to cramping in his right leg.
Yu Darvish lost to the A's after giving up five runs in five-plus innings and walking six on Wednesday.
Yu Darvish allowed three runs over 6 2/3 innings in a loss to the Twins on Friday.
Yu Darvish allowed two runs in seven innings Saturday in a no-decision against the White Sox.
Yu Darvish experienced some tightness in his gluteus maximus during his start on Tuesday night.
Yu Darvish allowed three runs on eight hits over seven innings in a victory over the Angels on Tuesday.