What happened: Alaina Getzenberg said Gardner-Johnson needed support leaving the field while athletic trainers examined his right-foot area. Teammates gathered around him before he was taken inside.

Why it matters: Gardner-Johnson joined Buffalo on a one-year deal worth up to $6 million this offseason. The timing puts immediate attention on the Bills' secondary plans during preseason preparations.

What to watch: Buffalo's next update and Gardner-Johnson's practice status will clarify his availability.