The Chargers will be the latest NFL team to learn that sins of omission in this league, at this time, are just as powerful as sins of commission.
Tuesday, they worked out Robert Griffin III, a former Heisman Trophy winner trying to resuscitate his career as a professional football quarterback.
It was a low-risk, low-commitment move, even if it ends with a deal (most fringe NFL contracts are largely non-guaranteed). Philip Rivers is as durable as NFL quarterbacks come, and the guys who have backed him up make most of their impact in meeting rooms and not on the field.