Generations of A's
We often talk about people by their "generation" in the United States—since people in this country are overwhelmingly immigrants or descended from people who immigrated in the last 400 or so years, most everybody is Nth generation for some N. On my super-paternal side (fathers all the way up, that is—I'm just inventing genealogical terms here), my grandfather's grandfather came to this country from Poland, which makes me fifth generation in that branch. (By some counting, I'm fourth-generation because it was my grandfather's father who was first, his father, the immigrant, not getting a generation number. That numbering system doesn't work for me, so I'll discard it here.) So what about on the A's? How did the current 40-man roster (plus 60-day DL) get to Oakland Athletica?
Anybody who is acquired in trade is mostly unclassifiable because trades often involve multiple players—if X is traded for Y and Z, then X's parents are both Y and Z, but if Y and Z are different generations, then how do you classify X? Half-numbers? That's dissatisfying (especially if Y is 2nd and Z is 4th—is X now 3rd?), so what I'll do is identify the major piece on the other side of the trade as the sole parent of the player in question. See Josh Donaldson below for an example: I'm counting Rich Gaudin (2nd generation) as a throw-in with Rich Harden (the major piece) in determining who Donaldson's parent is.
As you'll see, if someone was drafted with a compensation pick because of the loss of a free agent, I count that free agent as the player's parent.
First-generation players (i.e. drafted by the team or signed as a free agent)
Second-generation players (i.e. acquired via a first-generation player)
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