Answer based on context:

Hoping to break their current losing streak the Cowboys played on home ground for an Interconference duel with the Jaguars. In the first quarter the Cowboys took the lead as kicker David Buehler hit a 34-yard field goal. But they fell behind with QB David Garrard getting a 10-yard TD pass to WR Mike Sims-Walker. In the second quarter, the Cowboys struggled further with Garrard finding TE Marcedes Lewis on a 42-yard TD pass, then in the third quarter he found WR Mike Thomas on a 15-yard TD pass, and then he found Lewis again on a 9-yard TD pass. The Cowboys responded in the 4th quarter with RB Marion Barber getting a 1-yard TD run. But the Jaguars scored again with Garrard scrambling 2 yards to the endzone for a touchdown. The Cowboys replied with QB Jon Kitna making an 8-yard TD pass to TE Jason Witten.

How many yards difference is there between David Garrard's longest and shortest touchdown pass?
33