When he arrived as Titans coach, Ken Whisenhunt joked that the ideal quarterback for his offensive system is named Kurt Philip Roethlisberger. Translation: Whisenhunt's greatest success as a play-caller has come with three different quarterbacks — Kurt Warner in Arizona, Philip Rivers in San Diego and Ben Roethlisberger in Pittsburgh. Their shared characteristics? All three are right-handed. Otherwise, I can't think of a real common denominator. Warner was a master of reading the defense quickly and throwing on time and on target. Rivers is a recovering gunslinger who became far more disciplined on Whisenhunt's watch. Roethlisberger is a big, sturdy quarterback who will move around the pocket and hold the ball until the last possible instant. Other than that, the three come in different sizes, different shapes and different arm strengths. All of which brings us around to Jake Locker. He's the Titans' quarterback of record and Whisenhunt's latest pupil. How well teacher and student mesh will go a long way in determining the success or failure of the Titans in 2014. Over the past few weeks, we've gotten glimpses into how Whisenhunt plans to use Locker. It appears that the coach is inserting the quarterback into his system, not molding his system to fit the quarterback. In other words, Locker is being groomed as a pocket passer. While that doesn't eliminate rollouts and bootleg passes on occasion, it means the majority of Locker's throws will come from a conventional pocket. Some see this as folly. Locker's mobility is one of his strengths. As a college quarterback at Washington, he was particularly productive when he made plays with his legs, either running for big chunks of yards or buying time until receivers worked free.