Coming off their road win over the Raiders, the Bears flew to Qwest Field for a Week 11 duel with the Seattle Seahawks, in a rematch of last year's NFC divisional game (which took place in Chicago). QB Rex Grossman made his first start since Week 3. In the first quarter, Chicago took the early lead with RB Cedric Benson getting a 43-yard TD run, while kicker Robbie Gould made a 31-yard field goal. The Seahawks replied with QB Matt Hasselbeck completing a 19-yard TD pass to WR D.J. Hackett. In the second quarter, Seattle took the lead with RB Maurice Morris getting a 19-yard TD run. The Bears regained the lead as RB Adrian Peterson got a 5-yard TD run. The Seahawks tied the game prior to halftime as kicker Josh Brown made a 40-yard field goal. In the third quarter, Seattle retook the lead as Hasselbeck completed a 4-yard TD pass to WR Nate Burleson for the only score of the period. In the fourth quarter, Chicago tried to come back as Gould kicked a 47-yard field goal. However, the Seahawks pulled away with Brown kicking a 23-yard and a 46-yard field goal. The Bears' final response was Gould nailing a 48-yard field goal. For Rex Grossman's first starting appearance in eight weeks, he went 24/37 for 266 yards. For Bernard Berrian, in his last three games against the Seahawks, he had a combined 315 receiving yards.
Question: How many incomplete passes did Grossman throw?
Answer: 13