I believe there may be a way to take replays of games and watch them again later. Will investigate this evening.
It looks like it makes these replays automatically. They're found, on W7, in:
C:\Users\<your user>\Documents\BloodBowl\Saves\Replays\
They're .db files, which I believe you play in Single Player mode (Load | Replay).
[Credit to scattered comments in this thread.]