As the Buffalo Bills gear up for the 2025 season, key concerns about their defense are being addressed. The team has high hopes for Joey Bosa, their significant offseason signing, but his injury history raises questions about his durability. With only 28 games played over the last three seasons due to injuries, the Bills are cautious yet optimistic that he can regain his double-digit sack prowess in their 4-3 defense. Meanwhile, questions loom over the interior of the defensive line. Ed Oliver is a strong anchor, but the performance of DaQuan Jones and the absence of Larry Ogunjobi due to suspension leave the team needing more after the draft investments on the line. Other depth chart positions will be monitored closely in training camp as the defense seeks to solidify itself before the season begins.