Because NOBODY on the sox, not even shingo, has been as good at preventing Inheritted runners from scoring...
He has the best DP rate of any white sox pitcher reliever or starter.
Cotts probably should have been in there for Jackson today, but he had pitched the last two days, and was probably unavailable. Or at least he should have been unavailable, as Cotts has been bad when when pitching 2 days in a row.