The Chicago White Sox placed right-handed reliever Daniel Webb on the 15-day disabled list Wednesday with a mid right back strain and activated right-hander Nate Jones.
Jones, who was on an injury rehabilitation assignment at Triple-A Charlotte, was reinstated from the 60-day disabled list.
Jones, 29, began the season on the disabled list while recovering from Tommy John surgery on his right elbow in a procedure performed on July 29, 2014. He appeared in three games with Class A Winston-Salem and six with Charlotte on a rehab assignment, compiling a 1.93 ERA in 9 1/3 innings.
Jones has not pitched in the major leagues since April 3, 2014. He is 12-5 and has a 3.55 ERA in 149 2/3 innings with 154 strikeouts in 137 relief appearances over three seasons (2012-14) with the White Sox.
Webb, 25, has gone 1-0 and has a 2.49 ERA in 21 2/3 innings with 15 strikeouts in 17 relief appearances this season.