"I don't have a timetable," Saladino said. "At least 10 days. It's like sciatic nerve-related stuff. Kind of ruled the back out of it. Going to try to find a way to get it to calm down.
"[The] past week's been really minor. Just the littlest bit. Still going out there and doing everything. Just yesterday when I hit the base, [it] fired up pretty good."
Engel, 25, is batting .221 with 10 doubles, eight home runs, 16 RBIs, 18 runs scored and a .463 slugging percentage over 42 games this season with Charlotte. He has hit .284 (21-for-74) over his past 21 games with the Knights after making a change with his approach by lifting his hands up a bit.
News of Engel's first big league promotion came late last night. He called his wife and parents immediately, before getting on a flight from Charlotte to Chicago early Saturday morning.
"My wife was a little bit more like, 'Oh my gosh. I'm so happy for you,'" Engel said. "My parents couldn't believe it. I got the call last night and couldn't have been more ecstatic. It was a pretty cool experience."
Willy Garcia, Kevan Smith and Engel made up the White Sox bench for Game 1 of Saturday's doubleheader with Detroit.
Scott Merkin has covered the White Sox for MLB.com since 2003. Read his blog, Merk's Works, follow him on Twitter @scottmerkin, on Facebook and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.