The obvious ones are Hunter, Jackson, ARod, Clemens, Trout, and Hernandez. Boggs, Jeter, and Syndergaard and clever. I would insert the Cuban flag insead of "cu" (I was thinking of copper). Wouldn't get "express" out of just the train, I guessed Walter Johnson. Can't tell that's a kid for Griffey. The chain used for "iron" is tough to guess. Never heard of the Jim Palmer or Tony Gwynn nicknames.