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CHICAGO — What a way to get the preseason started for the Broncos.

Just a few minutes in to his first drive as a Bronco, quarterback Mark Sanchez launched a 32 yard touchdown pass to Demaryius Thomas.

Coach Gary Kubiak named Sanchez the starting quarterback for the game against the Chicago Bears at Soldier Field.

Sanchez played the first quarter and completed 10 of 13 passes for 99 yards, with one touchdown and one interception.

Trevor Siemian played the second quarter and first-round draft pick Paxton Lynch took over in the second half.

The question is, who will be the starting quarterback when the Broncos open the regular season at home against the Carolina Panthers on Sept. 8?