Hardy suffered a strained left wrist after sliding head first into third base during the Twins' walk-off victory over the Tigers on Tuesday.
Hardy tripled in that game and came home to score the winning run on a wild pitch in the bottom of the ninth inning, but was sidelined for the series finale with Detroit on Wednesday.
The shortstop's sore wrist is not thought to be a serious injury, but Twins manager Ron Gardenhire said at least one more day of rest was needed.
"J.J. is still sore and not ready to go out and play himself," Gardenhire said. "We are going to give him as much time as he needs for that wrist, too. It feels better than it did [Wednesday], but it's still too sore."
Reliever Pat Neshek reported on Twitter that the injury that sent him to the 15-day disabled list was not a sore flexor tendon on the middle finger of his pitching hand after all. Neshek tweeted that the pain was actually in the palm of his pitching hand, not the middle finger.
"Went to hand specialist, found pain was coming from my palm and not my finger like first diagnosed," Neshek said on his Twitter account. The side-winding right-hander said the hand specialist discovered inflammation and fluid in his palm pulley tendon, but that there were no tears to the tendon. In about a week, Neshek may have a cortisone shot to see if it relieves the pain he is experiencing.
Gardenhire wasn't aware of Neshek's exact diagnoses prior to Thursday's game with the Orioles.
"I don't read Tweets. All I know is he is on the DL with an injured finger. Our doctors and trainers are doing all they can to get him well. We are doing everything we can to get this young man well so he can pitch again," Gardenhire said.