DENVER (AP) — Eddie Butler controls his emotions about as well as he does his pinpoint fastball.

On the eve of his major league debut, the Colorado Rockies’ prized pitching prospect is hardly showing any traces of tension. The team is bringing Butler up from Double-A Tulsa to pitch against the Los Angeles Dodgers on Friday and is hoping he adds a spark to a scuffling starting rotation.

The 22-year-old is taking it all in stride. He said, “if I go out there and pitch six innings and have us in the ball game, that’s going to be a great day.”

Colorado made one thing very clear — the team is not counting on Butler to swoop in to rescue the season, only to keep the Rockies in games.