Brock (hamstring) who is doubtful for Thursday's final preseason game, is expected to be ready for the 49ers' season opener against the Vikings, CSN Bay Area reports.

EDGE Analysis

Brock only appeared in three games last year dealing with a nagging leg and foot injuries, so it is hard to put faith in him staying healthy this year. He is still expected to start at one of the corner positions once the regular season begins.