Right-hander Liam Hendriks was back in Chicago on Thursday and the White Sox closer could make his return from stage-4 non-Hodgkin's lymphoma as early as Monday.
Hendriks is scheduled to throw live batting practice to teammates Friday and an assessment will be made from there on when he would pitch in a major league game.
Hendriks, 34, was diagnosed on Jan. 9 and completed his final round of chemotherapy April 5. He began a rehab assignment on May 5 at Triple-A Charlotte, where he posted a 10.80 ERA in six appearances.
"When he throws [Friday], we'll wait and see the outcome, how he feels, what the numbers were (and) evaluate it really well," White Sox manager Pedro Grifol said.