Drafted in the 8th round (251st overall) by the Houston Astros in 2009 (signed for $150,000).
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Walker is all promise and potential, for 6-foot-3, 180-pound righthander has a thin resume. Drafted out of high school in the 21st round by the Rangers in 2006, Walker went 0-1, 7.11 this spring and never won a game in three seasons at Stanford. Scouts attending the Cardinal's fall practice saw Walker touch 95-96 mph with his fastball, the type of velocity that drew draft attention despite his lack of on-field results.
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