49ers' Akeem Spence: Suffers potential concussion

Spence left Thursday's preseason game against the Texans to be evaluated for a concussion, Aaron Wilson of ProFootballNetwork.com reports.

Spence left the game in the fourth quarter, so he is unlikely to return to action. He joined the 49ers as a depth option after Maurice Hurst (biceps) landed on injured reserve Aug. 1.