Coach Mike Vrabel on Monday eased concerns over Mariota's setback, calling the elbow issue "a stinger," per Jim Wyatt of the team's official website.
Vrabel expressed hope that Mariota would be able to suit up for Tennessee's critical showdown with the Texans next Monday night, but noted the veteran passer might seek a second opinion.
The Titans are also keeping an eye on defensive coordinator Dean Pees, who left Sunday's game with a "medical issue" before staying overnight in an Indianapolis hospital.
"Tests came back positive," Vrabel said Monday, noting Pees is "expected to return from Indy today."
Sitting at 5-5, the Titans remain in the thick of the AFC wild-card race while also in play for a division title.