Colin Kaepernick threw a touchdown pass to cap his only drive, and the San Francisco 49ers roughed up the San Diego Chargers 41-6 in the exhibition finale for both teams Thursday night. Kaepernick faked an inside handoff and then threw a short sidearm pass to Quinton Patton, who deked rookie free agent Marcus Cromartie and completed the 43-yard scoring play. Coach Jim Harbaugh started the first-team offense of the 49ers (3-1), while Chargers rookie coach Mike McCoy sat his first-team defense. Chargers (1-3) backup quarterback Charlie Whitehurst was sacked four times in the first half and third-stringer Brad Sorensen threw two interceptions in the second half. San Francisco linebacker Cam Johnson sacked Whitehurst twice and blocked a punt by Mike Scifres and recovered it in the end zone for a touchdown late in the third quarter. Source: Associated Press [ame="http://www.nfl.com/videos/nfl-game-highlights/0ap2000000236335/Pre-Week-4-49ers-vs-Chargers-highlights"]Pre Week 4: San Francisco 49ers vs. San Diego Chargers highlights - NFL Videos[/ame]