Jenks has been suffering with this problem for over a week now. He expects the operation to be done on an outpatient basis. Although he should immediately be relieved of his problem, he might need a few days of recovery before he can get back on the field.
The South Siders are in the middle of a 10-game homestand and begin a three-game series with the Angels on Tuesday night at U.S. Cellular Field.
Bruce Levine covers baseball for ESPNChicago.com.