On Friday, the ESRB website added a listing for RBI Baseball by upstart developers Six Degrees Games. While the new development team does not list the game on their website, their job listing section notes the team is "inventing a new generation of vibrant, mass-market gaming applications for the internet," which lends weight to the game being an Arcade release.
While we're on the subject, here's a free tip to EA. Take the classic Madden and NHL source codes, add new teams and updated rosters, sprinkle in some online play, watch XBLA monies pour in.
Your classic sports game history lesson available after the jump.