The Detroit Tigers selected Pinero in the ninth round of the 2016 MLB draft. He signed with the Tigers,[5] and made his professional debut with the GCL Tigers. After slashing .333/.448/.667 with two home runs and six RBIs in seven games, he was promoted to the Low-A Connecticut Tigers and he finished the season there, batting .261 with 16 RBIs in 43 games. In 2017, he played for the Single-A West Michigan Whitecaps where he batted .289 with four home runs and 56 RBIs in 120 games.[6] In 2018, Pinero spent the year with the High-A Lakeland Flying Tigers, slashing .263/.352/.396 with 9 home runs and 59 RBI.[7]
Pinero split the 2019 season between the Double-A Erie SeaWolves and the Triple-A Toledo Mud Hens, posting a slash of .235/.328/.417 with 15 home runs and 52 RBI in 116 games between the two teams. Pinero did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[8] In 2021, Pinero only made 15 total appearances, all with Toledo and Lakeland, and hit .216/.375/.405 with 1 home run and 7 RBI. On March 25, 2022, Pinero was released by the Tigers organization.[9]