MLB Power Rankings 2015: Week 4 Detroit Tigers No. 1

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Apr 23, 2015; Pittsburgh, PA, USA; Chicago Cubs second baseman

Addison Russell

(22) makes a sliding attempt on a ground ball against the Pittsburgh Pirates during the sixth inning at PNC Park. The Pirates won 5-4. Mandatory Credit: Charles LeClaire-USA TODAY Sports

10. Chicago Cubs (10-7)

What prospect are they calling up this week?