49ers Sign Veteran Cornerback, Wishnowsky and Luter Out Indefinitely

The San Francisco 49ers have signed veteran cornerback Terrance Mitchell to a one-year deal, while rookie cornerback Darrell Luter and punter Mitch Wishnowsky have been sidelined indefinitely due to injuries. Luter sustained a knee injury during the offseason program and is expected to be out for a few weeks, while Wishnowsky "tweaked" his back while lifting weights. Quarterback Brock Purdy, who underwent elbow surgery, has received full clearance to practice and will join the first-team offense in the coming days.