Thompson pitched in five games out of the bullpen with the White Sox in 2014, making his debut on July 20 with a scoreless 1 2/3 innings against the Houston Astros. His final outing with the club came Aug. 3 when he gave up three runs in an inning against the Minnesota Twins. He finished his short stint with a 10.13 ERA over 5 1/3 innings.
Thompson was a former 44th-round draft pick by the White Sox in 2009 out of Auburn. He has a 2.55 ERA in 279 minor league innings over six seasons.
With the move, the White Sox’s 40-man roster is at 36.