Despite the fact that he is, indeed, a Cub, Tyler Colvin went nuts for me in the playoffs that just finished last night. Hmm, I think this link should work:
http://fantasygames.sportingnews.com/stratomatic/playoffs/team.html?user_id=330487
In 13 games, Colvin went deep 9 times to help my team win the title. He also dropped in 3 doubles and 2 triples for 54 total bases and an OPS of 1.655. Only six of his 20 post season hits weren't for extra bases. I'm pretty sure 9 HRs would be an MLB record for post season homers--and they usually play a lot more games.
However, I'm sure there is some ATG league where three guys hit 12 or more or something... :)