NFL rosters are generally cut down to the bare essentials with playoff teams like the Tennessee Titans, often left in search of depth later in the season.
Last year, Adoree Jackson went down after the Titans had already lost Malcolm Butler to I.R. which meant that Tramaine Brock was signed to help patch that hole with someone with real NFL experience instead of asking an UDFA to step in and play against teams like the New England Patriots, New Orleans Saints, Baltimore Ravens, and Kansas City Chiefs.
Most people forget about that because Adoree Jackson managed to come back when the playoffs started, but that problem didn’t go away and the Titans did end up playing Brock in the playoffs at different points.