MLB's connections to the superhero world

I was not a big superhero/comic book kid growing up. If you had asked a ten-year-old me in 1990 who were the big superheroes, my response probably would not have been very deep. There would've been the cartoon superheroes I grew up on (He-Man, Thundercats, Voltron, Transformers, etc.) and the old staples (Superman, Batman, Spider-Man). I probably wouldn't have even been able to tell you who Wolverine and Professor X and the rest of the X-Men were at the time. Thankfully, that all changed somewhat as I grew up. I still can't tell you all of the intricacies of the thirty-five current Batman or Spider-Man universes, or even what the deal is with this summer's superhero-du-jour Thor, but I at least have a strong familiarity with many heroes. It recently occurred to me that, over the past decades, these comic book superheroes have slowly crept into our beloved game of baseball - in the form of nicknames. We aren't exactly to the point of seeing entire lineups of sup...