CHICAGO -- Right-hander Reynaldo Lopez will start and make his White Sox debut on Friday night against Kansas City following his recall from Triple-A Charlotte earlier in the day. To make room for Lopez, the White Sox assigned lefty David Holmberg to the farm club.
Lopez appeared in 11 games for the Nationals in 2016, starting six, and was 5-3 with a 4.91 ERA. In 22 starts with Charlotte this season, he was 6-7 with a 3.79 ERA.
"His last four or five outings in the minor leagues have been very good, so we hope that will transition here," manager Rick Renteria said.
The White Sox also acquired minor-league right-hander Ryan Burr from the Arizona Diamondbacks on Friday for international signing bonus pool money. Burr, 23, has split the season between two A-level clubs.