Wow, you're right. Number four under fair play:http://help.yahoo.com/l/us/yahoo/baseba ... es-29.html
"No owner will make any roster moves (including waiver claims, trade proposals, etc.) whose sole purpose is to hamper the play of other owners."
This doesn't seem well thought out. Number 4 contradicts number 1:
"All league-related transactions will be executed with the intent of improving the owner's team and/or its standing within the league."
If I can pickup a guy that you might want, even if I don't use him, that can improve my standing. Personally, I think it's completely fair game to grab players that would help the competition. As long as the intent it to help your team improve in the standings, I think it's fair. Why would he dump a bunch of pitchers if he knew you would all pick them up?
That said, I don't really think number 4 applies in this case. It sounds like he picked up all the pitchers to use on his last day of innings available. If that's the case then you're suggesting perhaps you should force him to drop players? He made the roster moves to use the pitchers. So now he's just NOT making roster movers. Even if you strictly apply rule 4, it requires the owner to specifically add a player for the purpose of preventing another team from getting him. The rule does not say anything about holding players you already have but no longer need.