The Houston Astros are so thin on their pitching staff that they're reaching back into the past to find depth they can stash away in the minor leagues. On Friday, Houston signed Miguel Yajure and Brandon Bielak to minor-league deals, and the pair had already reported to Triple-A Sugar Land. Both transactions were revealed on their player pages as MiLB.com.   This will be Yajure’s first stint with the Astros . For Bielak, he’s returning to the organization that drafted him nearly a decade ago. Astros Sign Minor League Depth Houston Astros starting pitcher Brandon Bielak. | Ron Chenoy-Imagn Images Bielak has a long connection to the franchise, dating back to being selected in the 11th round of the 2017 MLB draft out of Notre Dame. It took the right-hander three years to make his Major League debut, as he was called up for the first time during the COVID-19 shortened 2020 season.…