Sierra was added to Class-A Rancho Cucamonga's roster Wednesday and will make his U.S. debut as the starting pitcher in Friday's game, Eric Stephen of SB Nation reports.
Sierra was expected to begin his tenure with the Dodgers organization as a reliever, but he'll make his debut as a starter nonetheless. The right-hander signed a six-year contract with the Dodgers this past January, so if he can impress during his time with the Quakes, he could move up to the higher levels of the minor leagues and possibly even contribute with the major league club by season's end, either as a starter or a reliever.