"Oh, not much, just sittin' around making up some cool baseball names. My favorites? Oh, I guess these are my favorites…" 

Handsome Trickle
Nut Crush
Winsome Hucker
Puppy Cola
Pippin Nipple
Djali Rancher
Cannon Brandish 
Gander Golly
Nuclear Tush
Generous Wallop
Oops Hobnobber
Lyrix Klack
Legend Wompwomp
A.D. Power
Famous Player

The great thing about these names is that they aren't even nicknames! None of them is real, but they also aren't nicknames.