The Mariners have had Cijntje use his right arm much more than his left in the last month-plus, but there's still plenty of time to develop both. Their current development plan has had him pitch with different arms at different points in the week, almost as if he is two different pitchers on a schedule, rather than switching mid-inning.

Jurrangelo Cijntje, the M's switch-pitching prospect, will jump onto the national stage when he pitches in the Futures Game during All-Star weekend this month.