Pittsburgh Pirates Alemais signed with Pittsburgh and made his professional debut with the
West Virginia Black Bears. He missed time at the start of the season due to a sprained wrist. On July 16, a double play he turned was ranked seventh on SportsCenter's Top Ten Plays. In 50 games split between the Power and the Low-A
West Virginia Black Bears, he hit .249 with one home run and twenty RBI. In 2017, he played for the Power and the High-A
Bradenton Marauders, and made a rehab appearance with the
Gulf Coast League Pirates. In 67 total games, Alemais batted .265 with four home runs and 34 RBI. In 2018, Alemais played for the Double-A
Altoona Curve, where he was primarily a second baseman for the first time in his career. He produced a slash line of .279/.347/.346 with one home run, 34 RBI, and 16 stolen bases in 120 games. He underwent a fourth shoulder surgery in February 2021, after sustaining an injury while playing defense for
Leones del Escogido. Alemais was released by the Pirates organization on March 25, 2022.
Staten Island FerryHawks On June 11, 2022, Alemais signed with the
Staten Island FerryHawks of the
Atlantic League of Professional Baseball. He played in 9 games, hitting .320/.414/.360 with one RBI and 7 stolen bases. On February 14, 2024, after a year of inactivity, Alemais re–signed with Staten Island. In five games for the FerryHawks, he went 2–for–20 (.100) with one RBI and one stolen base. Alemais was released by Staten Island on May 10. On May 31, 2024, Alemais announced his retirement from professional baseball. ==Personal life==