Cardinals Place P.J. Mustipher on IR After Foot Injury, Add Brodric Martin to Camp Roster

The Arizona Cardinals moved quickly on their defensive depth picture, placing offensive lineman P.J. Mustipher on injured reserve after a foot injury surfaced during the early portion of training camp. In an update released by the team on August 1, head coach Mike LaFleur indicated the issue was identified after the first padded practice of camp and that Arizona was initially waiting to determine severity before reaching an IR decision.

Alongside Mustipher’s status change, the Cardinals also reported that another defensive player, Jaden Davis, was sidelined for the season due to a camp injury. With both players out before the campaign is underway, the Cardinals treated the opening weeks of practice as a roster-building test, not just a conditioning phase.

To address the immediate need created by those losses, Arizona announced it had signed CB Trevin Newsome and Brodric Martin as replacement options. The transaction framing is important for camp context: when a team removes multiple players for the season this early, additions are less about long-term planning and more about being able to cover reps in live periods, scout-team continuity, and package-specific practice goals.

LaFleur’s comments placed the injury timeline at a point when many teams are still trying to find their rhythm in pads. That matters because the first padded work typically accelerates physical contact across the defensive front and coverage units, which is where minor issues can become major, and where coaching staffs are especially focused on maintaining continuity across early install phases.

From a roster construction standpoint, Mustipher’s IR designation changes the Cardinals’ internal depth math across the defensive interior. Even if a team has alternate bodies available for the earliest stages of camp, the absence of a player for the season forces a more permanent adjustment to roles and responsibilities, including who gets first-team reps during full-speed practice and how packages are rotated when starters need rest.

Adding Newsome and Martin also suggests the Cardinals were looking to keep coverage and front-line options available during the remainder of training camp. While preseason practices often feature a wide mix of players, losing established practice contributors this early tends to shift opportunities toward late-signed or less-established players, increasing the importance of performance during team drills and special teams evaluations.

Looking ahead, Arizona will likely focus on protecting the health of the rest of the defensive group as camp moves deeper, while integrating the newcomers into the learning curve of team structure. The team’s next public updates on practice availability and positional roles will be the clearest barometer of how quickly the Cardinals can restore stability after this early camp injury wave.