Lynn has a slight tear in a tendon by his knee and will undergo surgery Tuesday, James Fegan of The Athletic reports. He's expected to be sidelined for approximately four weeks before resuming mound work.
Lynn exited Saturday's spring game against the Diamondbacks due to right knee discomfort. After being sent in for an MRI, Lynn was recommended to undergo surgery, putting him on track to miss significant time to begin the regular season. The White Sox are hopeful that the right-hander will be able to resume throwing by the end of April or in early May, but because he'll need additional time to build up for starting duty, he could end up being sidelined until late May or sometime in early June. Reynaldo Lopez and Vince Velasquez should be in the mix for the final spot in the White Sox rotation while Lynn is sidelined.