Let's try an experiment. Get a Rosin bag, toss it in the dirt (this is where it lies.), now work out a little to get your hand a little sweaty, now pick up the Rosin bag and wipe your hand off so you have some grip. Toss it back down IN THE DIRT. Now look at your hand and remember where the dirt is. Now, wash your hands, get the sweaty again. Pick up the rosin bag and wipe your hand, NOTE WHERE THE DIRT IS. $10 bucks it will be in the same spot.
PLayers are creatures of habit -- they work out and warm up exactly the same every game. They pick up the rosin bag and wipe thier hand exactly the same way, everything is done the same every time -- that is how they get into a rythm. As a result, it is very likely that a pitcher who uses a dirty Rosin bag, will have dirt marks on his hands in the same exact spot every time.
Let's try an experiment. Get a Rosin bag, toss it in the dirt (this is where it lies.), now work out a little to get your hand a little sweaty, now pick up the Rosin bag and wipe your hand off so you have some grip. Toss it back down IN THE DIRT. Now look at your hand and remember where the dirt is. Now, wash your hands, get the sweaty again. Pick up the rosin bag and wipe your hand, NOTE WHERE THE DIRT IS. $10 bucks it will be in the same spot.
_______________________________________________________
ROFL, first of all, a rosin bag in cold weather doesn't help, it hurts. Also, I've been around rosin bags for 20 years....never once have I seen it turn that color on a hand. Pine tar, yes. Rosin, no.
That would be a decent argument if the following were true:
1. The opposing pitcher had a similarly colored spot on his hand (he didn't)
2. The rosin bag were dirty (when they showed the rosin bag, it looked pretty clean and white)