You can limit the numbers of overall games pitched by starting pitchers for the season, but not weekly. Well I guess you could set the overall limit at 7 games started the 1st week, and up to 14 games the 2nd week, 21 the 3rd week, and keep going till the seasons over. The commish would just have top change the settings each week, take you about 10 seconds to do it, so yah you can limit the number of starts each week. Wait if you did that, someone may end up with a whole bunch of starts left for use in the second half. Be careful.