Mausi (undisclosed) had his 21-day practice window opened by the Titans on Wednesday, Jim Wyatt of the team's official website reports.
Mausi has been on injured reserve since late August while dealing with an undisclosed injury, but he was able to log a full practice Wednesday, per Wyatt. The linebacker could return to action as soon as Sunday versus the Browns, but he'll have to prove his health at the team's final two practices of the week first.