The defense played well enough to give the Colts a 6-4 record.
The Colt offense lost these three games:
1) Cardinals.... With 7:38 left in the 4th, Phoenix gets their first TD cutting the Colts lead to 13-10. In regulation the Cardinals would get one more field goal, and the Colts offense would punt 3 times. Then, in OT, the Colts offense throws a pick at the IND 21 giving the Cardinals an easy winning field goal.
2) Bengals....The Colts lead 23-17 with 7:05 left in the 4th when the Colts offense threw a pick 6 giving the Bengals what would become the winning score at 24-23. The Colts offense had two more possessions where they punted and failed on 4th down.
3) Steelers....The Colts lead at the beginning of the 4th quarter 17-9 when the Colts offense threw a pick at the IND 10 yd line giving the Steelers a 1st and goal resulting in a tie game 17-17. The Colt offense would not score again and the Steelers kicked a game winning field goal when time expired.