October 3, 2021 5:15 pm Shanahan ‘frustrated' with pair of defensive miscues 49ers head coach Kyle Shanahan thought his defense played well but pointed out two key penalties that were “hard to overcome.” 49ers videos 0:58 49ers Talk: 49ers sign Terrell Owen's son Terique as undrafted free agent 1:25 49ers Talk: Is ‘writing on the wall' for Samuel's future in San Francisco? 1:30 Watch Brenden Rice's receiving highlights from USC 1:32 Watch Frank Gore Jr.'s rushing highlights from Southern Miss 5:42 49ers' seventh-round pick Bethune models game after Greenlaw