Chicago White Sox right-hander Lance Lynn will be sidelined for four weeks due to a right-knee injury, general manager Rick Hahn said Sunday.
Lynn was recovered Saturday night from his last start of spring training with an injury to his right knee.
He will undergo a procedure on Tuesday to repair a “small” fracture in the knee and will not return to the mound for four weeks, which means it may take longer before he is ready to pit in a match.
The 34-year-old had problems with the same knee last season and went on the injured list for 10 days. He also spent almost a month after the season resting and rehab the knee.
Lynn went 11-6 with a 2.69 ERA in 28 starts last season and finished third in American League Cy Young Award voting, behind winner Robbie Ray of the Toronto Blue Jays and New York Yankees ace Gerrit Cole.
The White Sox will likely turn to right-handers Reynaldo Lopez and Vince Velasquez to help fill in for Lynn.
The Associated Press contributed to this story.