Football Outsiders just published their research on "adjusted interception rate" from last season. I thought it was interesting. It provides a better picture than just straight interceptions.
The formula for adjusted interception rate is fairly straightforward. Take total interceptions, add dropped interceptions, and subtract interceptions from Hail Marys and receiver tips. Divide by number of pass attempts. Football Outsiders runs a game charting project which notes these sorts of plays.
Ponder threw thirteen actual interceptions in games last season, which we can agree was too high. He especially seemed to struggle on out routes, as I'm sure Charles Woodson will attest to. Of those thirteen interceptions, one was a Hail Mary. But Ponder also threw five passes that should have been picked off, only for the defender to drop the ball. That gives him a 5.8% adjusted interception rate, which is third highest among the 33 quarterbacks throwing over 200 passes. Ponder needs to be much better at taking care of the ball.