I'm sure Datarek will respond, cholatse, but I interpret the rules as follows:
1. We start with one "key: season from our franchise and pick at least thirteen players from that season.
2. We then add up to 12 players who must come from four seasons adjoining our "key season", with no more than three players from any individual season.
3. Thus, we are picking players from five seasons: our "key" season, plus the four adjoining seasons.
4. Finally, we select 10 AAA players (6 hitters and 4 pitchers) who can come from any season of our franchise from 1980-2012