Packers bolster tight end group with additions of McCallan Castles and Drew Biber

The Green Bay Packers moved quickly to add depth at tight end on Tuesday, bringing in two players to help a unit that has been affected by injuries. According to Yahoo Sports, the team signed McCallan Castles earlier, and then also added Drew Biber as the Packers looked to ensure they had enough bodies for Tuesday’s practice.

Tight end has been a critical part of Green Bay’s offensive personnel, and the timing of these additions matters because preseason-week practice reps can influence timing, route work, and role clarity. With multiple tight ends listed as injured in the report, the Packers faced an immediate numbers issue that goes beyond depth-chart optics.

Yahoo Sports framed the roster need around the injuries to Tucker Kraft, Luke Musgrave, Luke Lachey, and R.J. Maryland. While practice provides the quickest way to evaluate new looks and personnel groupings, it also exposes roster gaps when several players are unavailable at the same time. In that context, adding two tight ends in one window is a straightforward roster management step.

McCallan Castles had already been reported as having been signed after previously appearing with the Packers’ practice-squad group in 2025. The addition suggests Green Bay wanted a player they had some familiarity with, potentially reducing the acclimation time needed for blocking assignments, spacing, and tempo within the tight end group.

Drew Biber’s signing, revealed in the Tuesday reporting, adds a second body to a room that suddenly required more than one reinforcement. The report did not provide further detail on Biber’s experience level, but the Packers’ decision to bring in two players at once indicates they were not simply covering for one missing roster spot, but for broader practice needs.

These moves also highlight how NFL roster planning often turns on injury timing. Teams can carry several tight ends on a 90-man-style offseason roster, but when injuries take out multiple players in a short span, it can force rapid supplementation even when the team believes it is otherwise set at the position.

For fans and team personnel, the next watch points are simple: how the newcomers fit into practice periods, which tight end roles they take on immediately, and whether the Packers use the two additions to keep their existing starters on a normal workload once they return to availability. For now, Green Bay’s message is clear, it wants functional depth at tight end before the work compresses into later August stages.