As the San Francisco 49ers gear up for their tenth NFL season under head coach Kyle Shanahan, three-time Pro Bowler Donte Whitner isn’t holding back on what he sees as a concern on his former team’s final roster. Donte Whitner, the ex-Pro Bowl safety who anchored San Francisco’s secondary during the Jim Harbaugh era, sat down with longtime Bay Area radio and TV analyst Rod Brooks on The Grit Code podcast to break down the 49ers squad heading into the season.