Tennessee's Patrick Bailey blocked a punt by the Colts' Pat McAfee in the Indianapolis end zone in the second quarter and McCourty fell on it for a score, handing Tennessee a 10-0 lead.
The Titans (4-3) also capitalized on a pair of interceptions in the victory.
Hasselbeck completed 23-of-33 pass attempts for 224 yards and hooked up with Nate Washington on 14-yard scoring strike with 5 minutes remaining for Tennessee.
Curtis Painter was picked off twice while tossing for 250 yards on 26-of-49 passing efficiency for Indianapolis (0-7), which was coming off a 62-7 loss to New Orleans last week -- the worst setback in team history.
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