hmmmmmmm.......... if your 6 starters pitch the #1 innings pitched for 2004 each your still well short of the cap.
255 * 6.
before you go crazy drop adding bust out your calculator and see how many innings these guys are throwing a week. 22 week season / 1975 innings = ~90 innings per week. Thats a lot of starts every week, but if they are already outpacing the average you can probably concentrate on playing more key matchups rather then grabbing whatever is out there for the night.
Pace out your innings over the rest of the season and work towards the goal...... don't just add guys every day to score innings pitched.