South Alabama quarterback Jake Bentley is doubtful to return against Troy after injuring his knee on the Jaguars' opening drive Saturday .
Bentley started the game at Troy, driving the Jaguars' offense down the field using his arm and legs.
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Bentley completed two passes for 22 yards and also rushed for 12 yards on the drive leading up to his injury.
The Jaguars scored on the drive giving them a 7-0 lead over Troy.
South Alabama backup quarterback Desmond Trotter replaced Bentley.