"Salty is still the same," manager Mike Redmond said. "I don't even know how long he's going to be."
By rule, Saltalamacchia must miss a minimum of seven days. If more time is needed, he would be transferred to the 15-day DL.
Jeff Mathis has been handling the regular catching duties, and rookie J.T. Realmuto was called up from Double-A Jacksonville to back up.
Realmuto is expected to get his first big league start during the two-day trip to St. Petersburg beginning on Wednesday.
"Salty has to make sure he is symptom-free," Redmond said.
Basically, the catcher's head has to be clear for three or four straight days before he can begin baseball activities.
Joe Frisaro is a reporter for MLB.com. He writes a blog, called The Fish Pond. Follow him on Twitter