On September 1, 2019, the Twins selected Graterol's contract and promoted him to the major leagues.[10] He made his major-league debut that day versus the Detroit Tigers, striking out the first batter he faced (Dawel Lugo) and pitching a scoreless inning in relief.[11] In 2019 with the Twins, he was 1–1 with a 4.66 ERA, making 10 appearances totaling 9+2⁄3 innings while striking out 10 batters.[12]
In 2021, Graterol pitched in 34 games for the Dodgers, with a 3–0 record and 4.59 ERA.[12] In the postseason, he pitched one inning in the Wild Card Game, 3+2⁄3 innings in the 2021 NLDS and 4+1⁄3 innings in the 2021 NLCS, allowing only one run on four hits while striking out seven.[12] In 2022, he pitched in 46 games and was 2–4 with a 3.26 ERA in 49+2⁄3 innings. He also picked up four saves, with his first career save being on June 26 against the Braves.[12]
On January 13, 2023, Graterol agreed to a one-year, $1.225 million contract with the Dodgers, avoiding salary arbitration.[17] He pitched in 68 games in 2023, with a 1.20 ERA and seven saves.[12] In his second season of arbitration, Graterol increased his salary to $2.7 million for 2024.[18]
In 2024, Graterol began the season on the injured list with a sore shoulder[19] and didn't rejoin the active roster until August 5.[20] In his first game back, he recorded one out, gave up a single and suffered a hamstring strain while pitching to the next batter, putting him back on the injured list after just eight pitches.[21] He rejoined the roster again on September 10[22] only to return to the injured list on September 26 due to shoulder inflammation.[23] In total, he pitched in 7+1⁄3 innings and allowed two earned runs.[12] Despite not appearing in the first two rounds of the playoffs, Graterol was added to the Dodgers roster for the 2024 World Series.[24] He pitched 2+1⁄3 innings over parts of three games, allowing one run on two hits and four walks.[12] Graterol underwent labrum surgery after the series to address the shoulder issues that had plagued him during the season, putting his status for 2025 in doubt.[25]
Personal life
Graterol grew up near Calabozo, Venezuela, and was raised by his mother, Ysmalia, and grandparents.[26] He married Allison Landa on January 22, 2021.[27]