CHICAGO -- The Chicago White Sox have recalled right-handed reliever Scott Carroll from Triple-A Charlotte.
Carroll on Friday replaced right-hander Erik Johnson, who was optioned to Charlotte immediately after taking the loss Thursday night against Boston.
The White Sox also announced catcher Alex Avila will begin a rehab assignment with Charlotte as he recovers from a strained right hamstring.
The 31-year-old Carroll has a 12.27 ERA in three minor league appearances this season. He had a 3.44 ERA in 18 relief efforts with the White Sox in 2015.