The Chicago White Sox have inched closer to welcoming back one of their outfielders. According to Scott Merkin of MLB.com , Austin Hays will head to Charlotte to start his rehab assignments on Saturday. How many innings Hays is expected to see in Triple-A is unclear, but the Sox will surely be cautious. Hays was off to a solid start in his first year in black and white before suffering a Grade-1 hamstring strain. The injury occurred on April 6 in the opener against Baltimore, meaning the team has now been without the veteran for the last 15 games. To the Sox's credit, they have been able to make up for Hays' absence decently well, especially as of late. Their offense has been humming over the last week-plus, with 15 home runs over the last week alone. The good news is that Hays should only help boost this side of the ball. The bad news is that making room for him in the outfield could actually be a slight challenge.…