Fantasy baseball news: Young prospects a risky fantasy proposition

The early success of Pirates phenom prospect Gregory Polanco makes him worth a fantasy gamble.

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● Mariners rookie Taijuan Walker will make a minor league start today in triple-A. There's been a lot of focus on hitting prospects so far this season, but Walker may be a bigger deal than any of them, as he's one of the highest-ranked pitching prospects in all of baseball. Walker has had some injury issues and hasn't gotten a chance to taste the big leagues this year. Still, he's at last healthy and could very soon find his way onto the Mariners pitching staff; this is maybe your last chance to stash him, if he's still available in your league.