I just finished a teriffic baseball book called "Where Nobody Knows Your Name" by John Feinstein.
The story is simple. Everyone of these men, and the many others he mentions, all feel like they belong in the majors. They've been set back by injuries, by circumstances, by the "business" nature of baseball, or just bad luck. They all belong there and they're gonna keep on trying until they're convinced to stop. Here are the main characters of the book. I've tried not to give any spoilers.
1999 Fleer Tradition #94 Scott Elarton
2006 Upper Deck #949 Nate McLouth
2003 Topps 205 #245 Scott Podsednik
2010 Bowman Chrome Prospects #166 Chris Schwinden
1998 Leaf #17 Brett Tomko