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“It’s been rough for the past couple of years and we’re doing everything we can to hurry it up so we can get back to those types of years,” Luhnow said.

Owens is 8-5 with a 3.14 ERA in 19 starts for Triple-A Indianapolis. He has 85 strikeouts and only 25 walks in 117 1-3 innings. Owens, a 28th round selection in the 2006 draft, will be placed on the Astros 40-man roster.,

The 22-year-old Grossman was hitting .262 with 20 doubles, seven home runs and 35 RBIs in 94 games for Double-A Altoona. Baseball America ranked him as the Pirates eighth best prospect. He was a sixth-round pick in 2008 out of Cy-Fair High School in Houston.

Cain, 21, is 3-5 with a 4.20 ERA in 16 starts for Class-A Bradenton. An eighth-round pick in 2009, Cain is a graduate of Waxahachie High School in Texas.