Purdue's had some 3 point jacking-itis on the road a couple times. You're not gonna go to the line much doing that.
For example, at Minnesota we shot 26 threes! That was over half of our shots. It's no shock we went to the line 5 times.
Against Ohio State, Purdue was only called for 5 more fouls than Ohio State, but Ohio State shot 22 more free throws.
A lot of it has to do with the type of game you play.