The Rockies will add Rule 5 selection Tommy Kahnle to the club's Opening Day roster, tweets Patrick Saunders of the Denver Post. Kahnle was taken from the Yankees in this year's draft as the fourth player chosen overall. The 24-year-old has put up good numbers in the minors, including a 2.85 ERA in 60 innings last year at Double-A. While he has shown the ability to register strikeouts, Kahnle struggled to keep from issuing free passes last year with a 6.8 BB/9 mark. But he showed the possibilities of his big arm this spring. In 9 2/3 innings, Kahnle struck...

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