He is sometimes credited with inventing the curveball. Greg Rhodes and John Snyder have speculated that Cummings invented the hanging curveball in 1877, since he went 5-14 for the Reds.
Cummings is the first HOF in MLB Reds History. So much was expected from him and so much wasn't deivered that the fans and Enquirer were up his rear all season and when he didn't produce like promised he quit the team early.
Cummings liked the ML, there the players owned a stake in the team more than they did in MLB.