[BizBroker]

For those who think that players cannot tell the difference and that under-inflated balls do not give an advantage...

http://espn.go.com/video/clip?id=12206777

[lepton]

New, Warm, clean, dry balls, told what the values were...

Note the hesitance on the 13 vs 15, even with all of those benefits. Not a lot, but tells you it’s very marginal.