Assuming constant deceleration due to wind resistance (and 10% speed reduction over 60.5 ft), it takes a ball traveling off the bat at 94 mph 0.462 seconds to go 60’ 6”.  It takes 0.378 seconds to travel the same distance starting at 115 mph.

That’s less than a tenth of a second difference using Phil Nevin’s data.

Rob:  It is more likely the relevant distance is about 53 or 54 ft, since the pitcher is about 5 ft in front of the rubber after release and the ball is hit 1-2 ft in front of the corner of home plate.  If I use 53.5 ft, then your 0.462 becomes 0.408 sec, assuming the speed off bat is 94 mph.  The 0.378 sec would correspond to a speed off bat of 101.5 mph.  Probably 10% loss over 53 ft is too much and is more like 9%. That will lower both results by about 0.5 mph.

Here is an analysis that might interest you.  Suppose we agree that 0.400 sec is the minimum amount of time needed for a pitcher to react.  Suppose also that we will ban all bats that are capable of hitting a ball that has a shorter flight time to the pitcher than 0.400 sec.  What maximum speed off bat does that imply?  How far would such a ball travel if hit at a typical home run launch angle (30 deg).  Here is the answer (I assume 53.3 ft flight distance from contact to pitcher):

Speed off bat:  95 mph
Home run distance:  356 ft

I dare say, if you eliminated all such bats, you would drastically change the game of baseball.

This is an unfortunate event for everyone involved. I hope that all parties involved can now find peace and closure. custom wood baseball bats have definitely come a long way in making the game safer.