Chicago granted his release per his request after bringing him on board with a minor league deal earlier in the offseason. He went 2 for 20 at the plate with 11 strikeouts this spring.
But the news still comes as a surprise from a two-time Gold Glove outfielder who is predominantly known for hitting home runs.
He originally posted a video saying "Goodbye outfielder" before clarifying that he's now moving to the mound.
"Just talking to Joey and talking to him this morning, just came to a mutual agreement that that was the best thing," said White Sox manager Will Venable. "Wish him luck as he starts a new chapter as a pitcher."
The now 11-year veteran has yet to hit over .200 in a season since 2019, also coming off a season where he hit .161 with 102 strikeouts in 260 plate appearances.