San Francisco 49ers defensive tackle Alfred Collins is out for the season after tearing his patellar tendon during team practice this week. Coach Kyle Shanahan says the injury happened at the team’s second practice in Melbourne.

The reports describe the setback as another blow to the 49ers’ defensive line, which has been described as largely unproven. One account focuses on the injury itself and the specific tendon involved, while another frames it in the broader context of depth and experience on the defensive front. Both sources agree on the cause, timing during practice, and the end-of-season outlook for Collins.

As of now, the team does not report a return timeline beyond the season being over for Collins. The 49ers will need to adjust their defensive line rotation while Collins recovers from the knee injury.