Brock Purdy to De'Zhaun Stribling and Other 49ers to Watch vs the Chargers in Preseason Game 2

San Francisco 49ers face pivotal position battles ahead of their preseason clash with the Los Angeles Chargers. Can rookies De'Zhaun Stribling and Kaelon Black cement key roles alongside Brock Purdy? Brian Peacock and Eric Crocker spotlight pressing roster decisions, including the heated left guard competition between veteran Robert Jones, Connor Colby and rookie Carver Willis, and the uncertain…