Gregory Stone Garrett (born November 22, 1995) is an American professional baseball outfielder, for the Washington Nationals of Major League Baseball (MLB). He made his MLB debut in 2022 with the Arizona Diamondbacks.
 Garrett was drafted by the Miami Marlins in the eighth round of the 2014 Major League Baseball draft out of George Ranch High School in Richmond, Texas. He signed with the Marlins rather than play college baseball at Rice University. He made his professional debut with the Gulf Coast Marlins. Playing with the Low-A Batavia Muckdogs in 2015, Garrett was named the Marlins Minor League Player of the Year after hitting .297 with a .933 On-base plus slugging (OPS), 11 home runs and 46 runs batted in.  
 He spent 2016 with the Single-A Greensboro Grasshoppers where he posted a .213 batting average with six home runs and 16 RBIs in 52 games. While with Greensboro, Garrett was involved in a prank with his then-roommate Josh Naylor. As a result of the prank, Garrett suffered a knife cut on his right hand that required three stitches, and was placed on the disabled list. In 2017, he played for the High-A Jupiter Hammerheads where he batted .212 with four home runs and 29 RBIs in 94 games. 
 Garrett returned to Jupiter for the 2018 season, appearing in 64 games and hitting .243/.280/.371 with 5 home runs, 30 RBI, and 14 stolen bases. In 2019, Garrett played in 119 games for the Double-A Jacksonville Jumbo Shrimp, batting .243/.289/.413 with 14 home runs, 63 RBI, and 15 stolen bases. He did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic. He elected minor league free agency following the season on November 2, 2020.
 After his stint with the Marlins, Garrett briefly decided to leave baseball and begin a full-time career in real estate. In 2021 he connected with a former Marlins scout on LinkedIn, who helped him try out and sign a minor league contract with the Arizona Diamondbacks on March 19, 2021. Garrett spent the majority of the season with the Double-A Amarillo Sod Poodles, also playing in two games for the Triple-A Reno Aces. In 103 games for Amarillo, he hit .280/.317/.516 with 25 home runs, 81 RBI, and 17 stolen bases. He was assigned to Reno to begin the 2022 season. In 103 games for the Aces, Garrett batted .275/.332/.568 with career-highs in home runs (28) and RBI (95), as well as 15 stolen bases.
 On August 17, 2022, the Diamondbacks selected Garrett to the 40-man roster and promoted him to the major leagues for the first time. In his debut against the San Francisco Giants, Garrett recorded his first two career hits as part of a two-double, one-RBI game. On August 28, he hit his first career home run, a solo shot off of Chicago White Sox starter Dylan Cease. He appeared in 27 games for Arizona in his rookie campaign, hitting .276/.309/.540 with 4 home runs, 10 RBI, and 3 stolen bases. On November 15, 2022, he was designated for assignment. On November 18, Garrett was non–tendered by the Diamondbacks and became a free agent.
 On November 29, 2022, Garrett signed a major league deal with the Washington Nationals. Garrett was optioned to the Triple-A Rochester Red Wings to begin the 2023 season. He was called up to the big league club soon after on April 2, 2023, after Corey Dickerson was placed on the injured list. In an August 23 game against the New York Yankees, Garrett landed awkwardly against the outfield wall while attempting to catch a DJ LeMahieu fly ball. The next day, he was diagnosed with a fractured left fibula. On August 26, Garrett was placed on the 60–day injured list, ending his season. In 89 games for Washington, Garrett batted .269/.343/.457 with 9 home runs and 40 RBI.