For Rockies, call-up of top prospect Eddie Butler isn't cut-and-dry

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Eddie Butler has gone 4-4 with a 2.49 ERA and 40 strikeouts for Double-A Tulsa this season.

Eddie Butler has gone 4-4 with a 2.49 ERA and 40 strikeouts for Double-A Tulsa this season.

In his first full season with the Rockies, Oklahoma product Jon Gray is 5-3 with a 3.86 ERA.

In his first full season with the Rockies, Oklahoma product Jon Gray is 5-3 with a 3.86 ERA.

For the Rockies, it turned out to be Column A. Though Butler is an advanced prospect with excellent stuff, he has not dominated consistently enough at Double-A to have made them entirely comfortable that he will do so at Coors Field. But as the Rockies sensed another season beginning to slip away, largely because of their pitching, they felt they had no other choice. Now they must hope it was the right one.