Titans coach Mike Vrabel told reporters after the game that he expects to have more information on Mariota's status Monday.
"I'll address the injuries tomorrow when I have some more information," Vrabel said when asked about Mariota. "Hopefully we'll be able to get some news with where he's at."
Mariota missed time earlier this season with a pinched nerve in the same arm. According to the team, the QB's injury is believed to be related to the one he suffered earlier this season.
Backup quarterback Blaine Gabbert went 11 of 16 with 118 yards and one touchdown and an interception in relief of Mariota.
"I asked him how he was on the field, and he said he would be OK," Vrabel said of Mariota. "We made the decision to go with Blaine.
"[We just wanted] to make sure there was an effective way to take care of the quarterback. All of our players want to finish the game and they want to compete, and they want to fight. And I definitely appreciate that in them. But I think at some point and time you have to get some other guys in the game."