Head coach Dave Canales plans to take "the next two days" to discuss Horn (quadriceps), Mike Kaye of ESPN.com reports.
Horn has had a productive NFL career, amassing 196 total tackles (139 solo), including 2.0 sacks, and 10 interceptions across 56 regular-season games over six seasons. He underwent surgery on his quad back in September. However, until Horn is back on the field or there is a more informative update, he should be considered week-to-week.