On July 11, 2014, Rivas signed with the Los Angeles Angels as an international free agent. He made his professional debut in 2015 with the Dominican Summer League Angels, hitting .258 in 65 games. Rivas split the 2016 season between the DSL Angels and rookie–level Arizona League Angels, accumulating a .290/.413/.379 batting line with one home run, 19 RBI, and 26 stolen bases across 59 total games.[1]
Rivas split the 2017 season between the rookie–level Orem Owlz and Single–A Burlington Bees. In 61 games between the two affiliates, he hit .286/.443/.397 with two home runs, 36 RBI, and 19 stolen bases.[2] Rivas spent 2018 with Burlington, also playing in two games for the AZL Angels. In a career–high 119 games for Burlington, he batted .234/.335/.326 with four home runs, 34 RBI, and 16 stolen bases.[3]
Rivas spent the 2019 campaign with the AZL Angels and High–A Inland Empire 66ers, slashing .227/.332/.361 with six home runs and 26 RBI across 80 appearances.[4] He did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[5]
Rivas spent the 2022 season with Chattanooga and the Triple–A Louisville Bats. In 95 appearances between the two affiliates, he hit .228/.318/.344 with a career–high seven home runs, 35 RBI, and 18 stolen bases. Rivas elected free agency following the season on November 10, 2022.[8]
On January 30, 2023, Rivas signed a minor league contract with the Seattle Mariners.[9] He spent the year with the Double–A Arkansas Travelers, batting .255/.411/.347 with five home runs, 47 RBI, and 50 stolen bases across 106 games.[10]
Rivas began the 2024 season with the Triple–A Tacoma Rainiers. On April 25, 2024, Rivas was selected to the 40-man roster and promoted to the major leagues for the first time.[11] He made his MLB debut on April 28, against the Arizona Diamondbacks and recorded his first career hit, a triple.[12]
