Preface: I'm in no way saying that I agree with this......

....but, my take is that they felt they were going to be able to control Batch and Pittsburgh's O in the 2nd half and were satisfied with a 7-point lead.

Therefore, they weren't willing to take a chance and risk putting Pitt in position to be able to score again before the half.

I don't think they felt that Batch could beat them and were satisfied with playing it conservatively.

........and, they were wrong.