Dobbs bolsters his 49ers backup QB case with strong showing vs. Raiders

LAS VEGAS — After three NFL preseason games, the 49ers have some tough decisions to make - including who they will choose as quarterback Brock Purdy's backup. Josh Dobbs strengthened his case in San Francisco's preseason finale against the Las Vegas Raiders on Friday night at Allegiant Stadium, completing 8 of 10 passes for 72 yards and one touchdown for a 130.0 rating. The Tennessee product has less experience than Brandon Allen in 49ers coach Kyle Shanahan's system, but Dobbs has seemed to catch on quickly since his arrival. "It was rolling well; it was smooth," Dobbs said of his first drive. "It can be hard when you're standing on the sidelines, especially all day, it feels like. With a 7 p.m. game, and you wait until after halftime to go in and play." Dobbs took over the 49ers' offense on the second drive of the second half. Purdy started the game and played three drives, then Allen came in and completed 5 of 7 passes for 60 yards and a 97.3 rating across four drives. "My goal when I get on the field is to go in and execute, and pick up exactly where they left off," Dobbs said. "So, getting into a rhythm as quickly as possible, trusting the guys around me that they are going...