Homerun sounds:
Press X when you hit a homerun and a foghorn will sound in the stands.

Big bat:
Hit two consecutive home runs. 

Big Glove 
Catch a homerun as it is going over the fence. 

Bigger Ball 
Get six strike outs in one game. 

Fast Players 
Steal three bases with the same player in one game. 

Small Players 
Get over eleven hits in one game. 

Super Defense 
Execute three double plays in one game.