If they go into the draft then their services won't go through a bidding process. In other words, it'll keep their potential earnings from jumping straight to the US down. There would be less financial incentives for them to come over before playing in Japan. Does it completely block the stream? No, but it keeps from too many coming over. Only the uber elite prospects who would be top five round material would come over. Honestly, that's one or two players a year. NPB draft has a cap of like 150k. 150k slot is 5th to 6th round. Couple this with an agreement by NPB to raise the maximum signing bonus to between 200k and 250k, then we're looking only at top three round material. Ah, so you're trying to figure out a way to stem the potential tide of Japanese talent bypassing NPB in favor of MLB. You're not the only one. http://www.japanball.com/news.phtml?id=13140