Quentin was injured Saturday when he made a running catch in right field and rolled over, jamming his shoulder into the turf. He was diagnosed with a sprained AC joint.
"It's better from originally what happened; it's definitely better," Quentin told reporters in Seattle. "But swinging, it's not there. The team is down a player and that's not fair to the team."
To replace Quentin on the roster, the White Sox will finally made the long-awaited move of bringing minor league slugger Dayan Viciedo to the major leagues. Viciedo was batting .297 with 20 home runs and 78 RBIs before going hitless in one at-bat Friday for Triple-A Charlotte.
Charlotte was playing at Durham, N.C., on Friday and Viciedo's arrival in Seattle was in question with Hurricane Irene bearing down on the East Coast. The White Sox are expected to make the move official on Saturday.
Quentin, who has been injury-prone for much of his career, had managed to stay healthy this season until the shoulder injury that sent him to the DL.
"Yeah, my body felt good; I felt good in the outfield," Quentin said. "I was playing good defense, better than I had been, moving well. And you know, obviously this wasn't a wear and tear thing. This was a dive in the outfield and it just happened. The good thing is it's getting better. I'll look forward to coming back at full strength."
Quentin is scheduled to come off the disabled list Sept. 5. Manager Ozzie Guillen said Viciedo will play every day at least until that date.
Doug Padilla covers the White Sox for ESPNChicago.com.