Alzolay left his start Monday against San Diego with a blister on his right middle finger, Gordon Wittenmyer of NBC Sports Chicago reports. He covered three innings before departing and gave up four runs on five hits and five walks while striking out four.
Alzolay's status for his next start is unclear at this point, though blisters don't typically result in extended absences. He'll likely be re-evaluated over the next few days before the Cubs determine if he'll be ready to take the hill this weekend versus St. Louis.