I think we should make a list of all versions of RBI out there for the site. Need some help folks, here is what I have:
NES
RBI
RBI2
RBI3
Super NES
Super RBI Baseball
Super Batter Up
Sega Genesis
RBI3
RBI4
RBI Baseball 93
RBI Baseball 94
Sega 32x
RBI Baseball 95
Game Gear
RBI Baseball 94
Batter Up
Amiga
RBI Baseball 2
Atari ST
RBI2 Baseball?
Commodore 64
RBI Baseball 2
IBM PC
RBI Baseball 2
Amstrad CPC
RBI 2 Baseball
RBI 2 was also released for the PC (http://www.the-underdogs.org/game.php?id=884). I tried it out with DOSBox - not good. It is editable, though... if only that had made it to the NES.
I also think RBI 3 was released for the Genesis... I'll do some looking and see if I can find a ROM or link of any sort.
And like most sequels, they pale in comparison to the original and best. Long live RBI.
I checked out GameFaqs, and they mention RBI 3 and RBI '94 for the Genesis, in addition to the two you listed; there are also ROMs of them at PlanetEmu.net.
That link you show is for a non-PC (commodore 64?) version, as the box has a casette inside. It did mention the PC though and you played it. I think all these computer versions of RBI2 (Amiga, ST, Commodore, PC) are likely the same game ported to different computing platforms. Who are these Domark fellas?
PC, RBI3 & RBI 94 for Genesis have been added...
Another "RBI 2 Baseball" found for the Amstrad CPC, a British computer company. It's been added...