Competing for that playing time are Darnell Savage, Caleb Ransaw, Andrew Wingard, and Antonio Johnson. The Jaguars also have rookie Rayuan Lane, who could help on special teams right away, and Daniel Thomas, who has been a core teams contributor for the Jaguars.

The Jaguars begin training camp this week. Here are players and key position battles to watch -- and a 53-man roster projection.

Before the Jaguars' first training camp practice, let's take a look at four positional battles on defense to watch closely.