Edgy MD wrote: Other differences: National League home plate umpies wore their chest protectors under the shirt or jacket, while ALers had the big foam shield. (I might have that backwards, but I don't think so.) One circuit routinely positioned the second-base ump on the infield grass on one knee, just inside the dirt, and the other kept him behind second, near the outfield grass. You've got the chest protector thing correct. As Grimm noted, that the AL umps used the big shield prevented them from crouching as much as their NL counterparts and, therefore, was seen as the origin of the low-strike/high-strike gap. Don't remember about the 2B ump but that may be correct. This may be my prejudice, but the National League ump roster was full of bigger characters with more authority, who were less likely to indulge arguments, tossing the manager and walking away early in a dispute. American league umps were more likely to go jaw to jaw with the managers for a few minutes (as if Billy Martin or Earl Weaver were somehow going to calm down as you heard them out), and these umps wouldn't toss them until a few minutes in after there was a bump or a line-crossing word, which was pretty much always "**********." Keith swears to this day that the NL had the better umps in his day and going back to before it as well, both in the nuts and bolts area as well as general deportment. Not sure how universal/provable/testable that theory is but one of the reasons behind the '90s era umpire movement when many would openly admit that they didn't call the rule book strike zone was that MLB had no right to control them because they weren't hired by MLB they were hired by either the AL or the NL and therefore weren't answerable to the commissioner's office as Selig sought to complete the slow-motion merger of the two halves. Still not sure why they thought a mass resignation was a good strategy for fighting their battle but, safe to say, it didn't work and wound up making Sandy Alderson a very happy man.