Callahan (groin) is questionable for Sunday's game against the Titans.
Callahan missed the Chargers' Week 14 win over the Dolphins but was able to practice all week. Given that he turned in a full session Friday, he looks to have a decent chance to return to the field in Week 15 against the Titans. Callahan has served a significant role in the secondary and has tallied 40 total tackles with six passes defended and three interceptions across 12 games on the season.