Bills begin mandatory minicamp with full attendance, early health watch, and a new defensive emphasis under Jim Leonhard

The Buffalo Bills kicked off their three-day mandatory minicamp on Monday, June 9, and the most immediate takeaway from Day 1 was simple: the building was staffed and most of the roster was present for the start of the required work window. That kind of clean attendance matters in the NFL offseason because mandatory minicamp is when teams tighten the installation phase after OTAs, review fundamentals at speed, and set the tone for how positions will be grouped through training camp. In Buffalo, that opening day also came with the usual mix of on-field observations and off-field updates from reporters covering One Bills Drive.

Head coach Joe Brady, in early comments relayed through members of the local media, declined to get specific about the nature of linebacker Dorian Williams’ situation, but Williams was seen using crutches and did not take part in practice drills on Monday. Buffalo Rumblings reported that multiple beat voices characterized it as a different issue from the neck injury Williams suffered late in the 2025 season. Brady’s stance, as summarized by reporters, was that it was still early and the team expects to re-evaluate the linebacker’s status as the offseason progresses, with the intent that he return for training camp.

Around Williams, several other players began the day on the sideline or in non-contact work. Reports from Buffalo beat coverage indicated that safety Cole Bishop and defensive back Dorian Strong were not participating on Day 1, along with right tackle Spencer Brown and wide receivers Skyler Bell and Tyrell Shavers. In addition, Buffalo Rumblings reported that safety Jordan Hancock and offensive lineman Lloyd Cushenberry started mandatory minicamp wearing red non-contact jerseys. For a team trying to build continuity for its offensive and defensive groups, these are the kinds of day-by-day availability questions that can shape who gets extra reps in individual and small-group sessions.

On the coaching and football-development side, attention also remained fixed on the transition into the Bills’ defensive work under Jim Leonhard, Buffalo’s first-year defensive coordinator. Sports Illustrated noted that Leonhard is bringing an entirely new scheme, and that early feedback from players who participated in spring practices was positive, including the idea that defenders had more freedom within the system. Mandatory minicamp is often where that theory meets more structured execution, and Day 1’s emphasis appeared less about headline-making plays and more about establishing roles, assignments, and comfort levels before training camp compresses the install further.

There were also individual performance and participation notes that offer clues about who could be trending upward as the required period continues. Buffalo Rumblings reported that Bell, though sidelined from practice on Monday, was still catching passes after practice using a jugs machine, while outside linebacker Michael Hoecht was seen participating with his defensive teammates during individual drills. For players returning from significant injuries, the ability to ramp even in limited ways during mandatory minicamp can be an early indicator of how teams plan their workload into camp, even though the day-to-day nature of offseason injury management always leaves room for changes.

Through Day 1, the Bills’ minicamp picture, as framed by local and national coverage, blended stability with caution: broad attendance and the opportunity to install under Brady and Leonhard, alongside a short list of players who were not full participants and one notable case that required evaluation in real time. What to watch next is whether Williams’ involvement changes over the next two days, how quickly the team can get its non-contact players back into portions of practice, and which defensive group rotations solidify as Leonhard’s scheme continues to take shape.