Robert D. Manfred Jr.
This is the current ball used in the Major Leagues. It features the stamped signature of Commissioner Rob Manfred.
Allan H. Selig
This ball featuring the signature of previous Commissioner Bud Selig was used from 2000-2014.
Gene A. Budig
Each league used to have its own ball. Budig was the president of the American League from 1994-1999.
Leonard S. Coleman Jr.
Coleman was the president of the National League from 1994-1999.
Brown was the president of the American League from 1984-1994.
William D. White
White was the president of the National League from 1989-1994.
Made in Haiti
Balls were made in Haiti through 1989. A few of them were still floating around the following season when I caught my first four.
Made in Costa Rica
Costa Rica, Part II
Balls are still made in Costa Rica, but shortly after the move, the words disappeared. Why? Because the balls are technically "assembled" there; the components come from all over the world. Import/export laws no longer required those words to be there.
Good enough for batting practice but not good enough for games, these blemished balls were stamped and sold at a discount to teams throughout the 90s.
NL practice ball
Some practice balls simply had "PRACTICE" stamped on them.
NL regular ball
Others didn't. ("RO-N" stands for Rawlings Official-National.)
MLB practice balls
Current practice balls are stamped differently.
Green training ball
In 2006 several teams used these balls during BP. They were cheap and ugly and made in China.
Blue training ball
These were used for the next few years, primarily in batting practice by the Nationals.