iOOTP does not have an option to use historical transactions and lineups. So, once a season begins, the trades that happened in real life will not happen in iOOTP. (I'm not sure if Federal Baseball will be any different.) However, trading can be enabled in iOOTP. The same is true in Federal Baseball. So, I assume that in Federal Baseball Johnny Bench could get traded to a different team during the season. So could Derek Jeter.
In iOOTP, if you decide to advance to the next season, you do introduce fictional players to the league. League evolution also does not occur. So, the example of Seattle and Toronto is correct. I'm not sure how Federal Baseball will handle the transition from one season to the next. If players have been traded during the first season, what will Federal Baseball do to those players during the following season? Return them to their original teams? Things could get strange roster-wise during the following seasons. (For example, if the Reds traded Johnny Bench, who would be their catcher the next season? If the game doesn't return Bench to the Reds, they will be without a key part of the Big Red Machine. Will Pat Corrales be expected to pick up the slack?) Federal Baseball claims to correct some of the historical problems with iOOTP. But it's not clear how they'll do it.
P.S. OOTP is about single season replays, if you want it to be. It handles them just fine! Please don't perpetuate a myth.
