Backup quarterback Charlie Whitehurst was an emergency quarterback with a capital 'E' during his time in San Diego.
Unless starter Philip Rivers had to be dragged off the field kicking and screaming due to an injury in most cases, Whitehurst was going to do nothing more than hold a clipboard and see a little action in preseason games. As a result, Charger fans probably were never 100 percent comfortable regarding the "what if" factor should Rivers go down.
According to terms of the deal, Clemens (joins youngster Brad Sorensen behind Rivers) was signed for a two-year contract to essentially be the emergency guy (unless Sorensen beats him out this summer) behind Rivers. Rest assured, there is no QB controversy in San Diego.
In eight years in the league, Clemens (40 games played) has thrown for 3,944 yards, 15 TD's and 20 INT's. His most productive season came last year with the Rams (starter Sam Bradford was injured during the campaign) when he threw for a career-best 1,673 yards and eight touchdowns.
Yes, barring an injury to Rivers or the Chargers get into a romp (one way or another), Clemens likely won't see much playing time during the regular season.
That said, his game experience compared to what Whitehurst offered, should give Charger fans a little bit better night's sleep if he must go under center with a game on the line.