The San Francisco 49ers have placed defensive lineman Tarron Jackson on injured reserve after he was carted off the field during a recent practice. This adds to the team's depth challenges as they also brought defensive end Jaylon Allen onto the injured list due to a neck injury requiring hospital attention. Though the precise nature and extent of Allen's injury are still unclear, neck injuries often carry longer recovery timelines, suggesting the possibility of him missing the entire season.

In response to these injuries, the 49ers have signed another defensive lineman to fill the vacancy left by Jackson. The 49ers' defensive line depth will be crucial as they prepare for the upcoming season, especially with the uncertainties surrounding Allen's return and Jackson's future rehabilitation.