The Green Bay Packers add two tight ends by signing McCallan Castles and Drew Biber, the team announces. Both moves happen on Tuesday. The signings expand the Packers’ tight end group as the team continues building its offseason roster. The reports describe the transactions as Packers signing the two players, without detailing contract terms or length. No additional context is provided in the available summaries about each player’s prior teams, background, or immediate role on the roster. Taken together, the sources agree on the key point that the Packers are bringing in both tight ends at the same time, indicating a coordinated roster addition rather than separate, unrelated transactions. With the signings confirmed by the Packers’ announcement, the next steps would typically involve integrating the new players during team activities, subject to league and team schedules.