The Astros will designate pitcher Lucas Harrell for assignment to create 40-man roster space for the promotion of prospect George Springer, reports Jose de Jesus Ortiz of the Houston Chronicle (via Twitter). It has been quite a fall from grace for the 28-year-old righty, who this time last year was being named as a solid trade target for contenders. Indeed, in 2012, he threw to a 3.76 ERA in 193 2/3 innings, with a 57.2% ground ball rate and 6.5 K/9 against 3.6 BB/9. But last year was a struggle, as Harrell managed only a 5.86 ERA in 153 2/3...

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