The White Sox released Knebel on Thursday, LaMond Pope of the Chicago Tribune reports.
Triple-A Charlotte reinstated Knebel (shoulder) from its 7-day injured list Tuesday.
Knebel (shoulder) began a rehab assignment with High-A Winston-Salem on Friday, Scott Merkin of MLB.com reports.
The White Sox reassigned Knebel (shoulder) to minor-league camp Wednesday, Vinnie Duber of AllCHGO.com reports.
White Sox pitching coach Ethan Katz said Thursday that Knebel (shoulder) is a bit behind other relievers in camp, James Fegan of SoxMachine.com reports.
Knebel signed a minor-league contract with the White Sox on Tuesday that includes an invitation to spring training.
Knebel will not return this season after being diagnosed with a tear in his right shoulder capsule, Matt Gelb of The Athletic reports.
Knebel (lat) was placed on the 15-day injured list Monday.
Knebel could miss some time after suffering a lat strain during Sunday's loss to the Mets, Matt Gelb of The Athletic reports.
Knebel was removed from Sunday's game game against the Mets with an apparent injury, Matt Gelb of The Athletic reports.