30th. Detroit is dead last in free-throw percentage, something you've no doubt heard multiple times over the course of a game as a Piston walks to the line. As a team, Motown is only converting 65.5% of its freebies, which, apart from being the worst completion rate in the League, is also the worst in franchise history. Although the Pistons are currently sitting at 17-14 on the season, they could easily have won a few more games had they been able to shoot their free-throws.
Of course, it doesn't help that the team's best career free-throw shooter, Jodie Meeks, is out with a Jones fracture, or that several of the players on the roster are currently shooting well below their career numbers.