Mercado was born in Cartagena, Colombia. His father, Oscar Sr., played soccer and worked as a general contractor. He has an older brother, Juan, and a twin sister, Nathalia. His family emigrated to the United States when he was seven years old on his father's work visa, and settled in Tampa, Florida.[1]
He spent the 2017 season with the Springfield Cardinals of the Double–ATexas League,[10] where he slashed .287/.341/.428 with 13 home runs, 46 RBIs, and 38 stolen bases in 120 games.[11] After the season, the Cardinals assigned Mercado to the Surprise Saguaros of the Arizona Fall League (AFL).[12] Mercado appeared in a total of 22 games for the Saguaros, posting a .264 batting average with 11 RBIs and six stolen bases.[8] The Cardinals added him to their 40-man roster after the AFL was over to protect him from being chosen in the Rule 5 Draft.[13] Mercado began 2018 with the Memphis Redbirds of the Triple–APacific Coast League.[14]
Cleveland Indians / Guardians
On July 31, 2018, the Cardinals traded Mercado to the Cleveland Indians in exchange for Conner Capel and Jhon Torres.[15] He was assigned to the Columbus Clippers of the Triple–A International League and finished the season there. In 132 games between Memphis and Columbus, he slashed .278/.349/.390 with eight home runs, 47 RBIs, and 37 stolen bases.[16] He began the 2019 season with Columbus.[17]
The Indians promoted Mercado to the major leagues on May 14.[18] He made his major league debut that day versus the Chicago White Sox.[19] Overall with the 2020 Cleveland Indians, Mercado batted .128 with one home run and 6 RBIs in 36 games.[20]
On June 21, 2022, Mercado was designated for assignment by the Guardians.[citation needed]
Philadelphia Phillies
The Philadelphia Phillies claimed Mercado off of waivers on June 27, 2022.[21] After appearing in only one game with the Phillies, Mercado was designated for assignment on July 1.[22]
Cleveland Guardians (second stint)
The Cleveland Guardians claimed Mercado off of waivers on July 3, 2022.[23] He was designated for assignment once again on July 11.[citation needed] After clearing waivers, Mercado was outrighted to Triple–A Columbus Clippers on July 14.[citation needed] He elected minor league free agency after the season on November 10.[24]
St. Louis Cardinals (second stint)
Mercado signed a minor league contract to return to the St. Louis Cardinals organization on November 18, 2022.[citation needed] He began the 2023 season with the Triple-A Memphis Redbirds, playing in 34 games and hitting .278/.361/.421 with two home runs, 12 RBIs, and 15 stolen bases.[8] On May 17, the Cardinals selected Mercado to the active roster.[25] In 20 games for St. Louis, Mercado batted .290/.313/.387 with no home runs, five RBI, and two stolen bases.[8] On July 3, Mercado was designated for assignment by the Cardinals.[26] He cleared waivers and elected free agency in lieu of an outright assignment on July 5.[27]
San Diego Padres
On July 7, 2023, Mercado signed a minor league contract with the San Diego Padres organization.[28] In 31 games for the Triple–A El Paso Chihuahuas, he batted .339/.399/.669 with 10 home runs, 37 RBI, and 10 stolen bases.[8] On August 22, Mercado opted out of his deal and became a free agent.[29]
Los Angeles Dodgers
On August 26, 2023, Mercado signed a minor league contract with the Los Angeles Dodgers organization.[30] In 15 games for the Oklahoma City Dodgers, he batted .259 with two homers and 35 RBI.[8] Mercado elected free agency following the season on November 6.[31]
San Diego Padres (second stint)
On December 28, 2023, Mercado signed a minor league contract with the San Diego Padres. [32] In 78 games for the Triple–A El Paso Chihuahuas, he batted .226/.307/.425 with 11 home runs, 42 RBI, and 12 stolen bases. On August 1, 2024, Mercado opted out of his contract and became a free agent.[33]
Detroit Tigers
On August 23, 2024, Mercado signed a minor league contract with the Detroit Tigers and was assigned to the Triple–A Toledo Mud Hens.[34] On November 6, he elected free agency.[35]