The Chargers bucked the recent trends with running backs by signing Donald Brown to a three-year, $10.4 million deal shortly after the start of free agency last week. The urgency of the move suggests that Telesco has fond memories of Brown from their shared time with the Colts and raised questions about how tied the Chargers are to Ryan Mathews as their lead runner. During an interview on The Mighty 1090 in San Diego, though, Telesco said that the presence of Brown and Danny Woodhead does nothing to threaten Mathews’ role as the top dog in 2014. “We know Ryan is our bell cow,” Telesco said, via “He’s our No. 1 back. He had an excellent year last year. And we all know what Danny Woodhead can do in his role. We saw that for 16 games last year.