Viciedo, who batted seventh for the series opener against the Orioles, entered the game with a .254 average, 19 homers and 57 RBIs.
He said his right shoulder is doing better.
"From the first day to today, it feels a lot better," Viciedo said through an interpreter.
He's still not exactly sure how the injury occurred, but Viciedo's been getting treatment since inflammation was found.
"I really can't pinpoint," he said through the interpreter. "I know that a few days ago, I felt some stiffness, some soreness in the shoulder, and I could throw, but then the next day when I tried to go out, I really couldn't throw."Viciedo went 0-for-4 with three strikeouts in Monday's 4-3 loss.