Hoping to break their losing streak the Chiefs played on home ground for an AFC duel against the Jaguars. In the first quarter the Chiefs took the lead as RB Jamaal Charles got a 4-yard TD run. But the Jaguars replied with kicker Josh Scobee nailing a 35-yard field goal. The Jaguars took the lead in the second quarter with QB Todd Bouman making an 18-yard TD pass to RB Maurice Jones-Drew. The lead didn't last long after RB Thomas Jones got a 1-yard TD run, but the Chiefs' lead was soon narrowed after Scobee hit an 18-yard field goal. The Chiefs scored in the third quarter with QB Matt Cassel completing a 53-yard TD pass to WR Dwayne Bowe. The Jaguars tried to come back with Bouman finding Mike Sims-Walker on a 9-yard TD pass, but the Chiefs pulled away as  ILB Derrick Johnson returned an interception 15 yards for a touchdown, followed by Cassel getting a 6-yard TD pass to Bowe, and with RB Jackie Battle making a 1-yard TD run.
Question: How many more yards was Bouman's TD pass than Cassel's?
Answer: 3