49ers need to put extracurriculars behind them, Chargers joint practice the ‘measuring stick’

The San Francisco 49ers will be guests in the Los Angeles Chargers’ El Segungo facility this week for their second joint practice of the preseason. They’d better be on better behavior than when they welcomed the Tennessee Titans last week … by instigating a half dozen skirmishes, including a handful in the first few snaps....