Date of Birth: 10/18/1994
Height: 6' 4" Weight: 195 lbs
Sierra in 2019 will begin his 6th season of professional baseball and first season in an X’s uniform. He began his career pitching for the Sancti Spiritus of the Cuban National Series where he posted a 3.68 ERA in 14.2 innings as a 19 year old. Unlike many of his other native Cuban players did not need to defect his home country to be able to establish residency and play baseball outside of the country. He was granted Spanish citizenship due to his grandfather’s roots allowing him to leave Cuba legally. He then pitched in the Canary Islands for the Tenerife Marlins in the Division de Honor de Beisbol the best league Spain has to offer.
He signed as an international free agent with the Houston Astros on December 24th, 2015. His first season in affiliated ball began late in June of that season but Sierra pitched well for the Astros Low A club mostly appearing out of the bullpen. It earned him a late season promotion to the Quad City River Bandits of Davenport, IA. In only 10 innings, he was able to hold an ERA of 1.80 while striking out 16.
Dominating A-Ball once again Sierra earned himself a quick promotion to High A during the 2017 season spending most of the year pitching for the Buies Creek Astros of the Carolina League. He would make 25 appearances for the Astros pitching 48 innings, going 3-1 with a 3.00 ERA and 49 strikeouts. Add in his 11 punch outs with Quad Cities earlier in the year in 9.1 innings, and Sierra’s 60 strikeouts that season are still his career high.
Sierra began last season in Buies Creek and once again showed Houston that he had mastered that level with a 3.32 ERA in 10 appearances, with 21 strikeouts in 21.2 innings. He was then promoted to AA Chorpus Christi there he pitched in 16 games and 21 innings with a 6.00 ERA. The Houston Astros released Sierra in March of this year.
The past winter Sierra spent in Puerto Rico with the Gigantes de Carolina, tossing 6 innings in 4 games with a 4.50 ERA.