1876: Curveballs are ruled "legal" purists cry that this will wreck the game as baseball is a 'gentlemens' game and it is immoral for the pitcher to try to "deceive" the hitter
1920: Baseballs are now wound tighter and unlike previously the object of the defense is not to try to scuff up and blacken the ball...henceforth, a new white ball must be brought into play whenever an existing one if scuffed. Hitters now have a much greater advantage.
1969: The mound is lowered...no longer can Bob Gibson with his season long 1.12 ERA dominate the way he did previously...advantage hitter
1970: The DH is implemented in the American League only...a revolutionary and major rule change.
1992 and forward: The dimensions of the parks become smaller...with Camden Yards leading the way of the new retro parks....Hitters have a huge advantage....Dodger Stadiums massive foul territory is covered over with Dugout club and baseline box seats...it is unlikely that anyone will ever score again from 2nd on a wild pitch a la Kirk Gibson in 1988.
1998? Interleague play
2009: Limited instant replay arrives in MLB: utilized only on disputed home run calls
Expanding the use of instant replay will not hurt MLB...it will make the game better..no more 2009 ALCS where the umpiring was despicable...etc..etc...and expanding replay is no where near as drastic a change as the lowering of the mound...Where were you captain in 1969? Were you speaking out against the mound change then? It is akin to widening the distance of the plate right? Were you upset about it..was the change good? Has it hurt baseball? Why or Why not?