Chargers planning to meet with Ryan Mathews’s agent this week

The Chargers made Ryan Mathews a first-round pick in 2010 and the last five years have been filled with highs and lows for the running back. On the high side are two 1,000-yard seasons, one of which also saw Mathews catch 50 passes out of the backfield, and a career average of 4.4 yards per…