Sadzeck signed with the White Sox as a non-roster invitee Thursday.
The 29-year-old righty owns a strong 2.18 ERA in 33 career innings at the highest level, though that's not backed up by his poor combination of a 22.4 percent strikeout rate and 17.1 percent walk rate. He missed most of 2019 with elbow troubles and didn't make the Mariners' 40-man roster at any point last season, so his chances of cracking the White Sox's Opening Day roster appear to be slim.