Sean Russell Poppen (born March 15, 1994) is an American professional baseball pitcher who is a free agent. He has previously played in Major League Baseball (MLB) for the Minnesota Twins, Pittsburgh Pirates, Tampa Bay Rays, and Arizona Diamondbacks.
Poppen attended Cape Henry Collegiate in Virginia Beach, Virginia. He attended Harvard University for four years (2013 through 2016), and played college baseball for the Crimson.
Poppen was drafted by the Minnesota Twins in the 19th round, with the 573rd overall selection, of the 2016 MLB draft. He spent the 2016 season with the Elizabethton Twins and the Cedar Rapids Kernels. In 2017, he played for Cedar Rapids and the Fort Myers Miracle. His 2018 was split between Fort Myers and the Chattanooga Lookouts. He split the 2019 minor league season between the Pensacola Blue Wahoos and the Rochester Red Wings, going a combined 7âÂÂ4 with a 4.01 ERA over 89.2 innings.
On June 19, 2019, his contract was selected and he was called up to the major leagues for the first time. He made his debut that night versus the Boston Red Sox. He posted a 0âÂÂ0 record with a 7.56 ERA over 8.1 innings for the Twins in 2019. Poppen finished the 2019 season on the injured list with elbow inflammation.
Poppen was designated for assignment by the Twins on September 29, 2020, when Alex Kirilloff was selected to the 40-man roster. With the 2020 Minnesota Twins, Poppen appeared in 6 games, compiling a 0âÂÂ0 record with 4.70 ERA and 10 strikeouts in 7.2 innings pitched.
On October 1, 2020, Poppen was claimed off waivers by the Pittsburgh Pirates. Poppen recorded a 7.71 ERA in 3 appearances before being designated for assignment on May 13, 2021.
On May 18, 2021, Poppen was traded to the Tampa Bay Rays in exchange for cash considerations. He was designated for assignment on July 30, 2021.
On August 2, 2021, Poppen was claimed off of waivers by the Arizona Diamondbacks. He finished the season appearing in 20 games for Arizona, registering a 1âÂÂ1 record and 4.67 ERA with 21 strikeouts in 17.1 innings pitched.
In 2022, Poppen made 29 appearances for the Diamondbacks, pitching to a 2âÂÂ2 record and 4.40 ERA with 22 strikeouts in 28.2 innings of work.
On December 2, 2022, Poppen was claimed off waivers by the San Diego Padres. On January 20, 2023, Poppen was removed from the 40-man roster and sent outright to the Triple-A El Paso Chihuahuas. In 47 games for El Paso, he struggled to a 1âÂÂ4 record and 6.33 ERA with 51 strikeouts across innings pitched. Poppen elected free agency following the season on November 6.
On January 18, 2024, Poppen signed a minor league contract with the Seattle Mariners. In two appearances for the TripleâÂÂA Tacoma Rainiers, he surrendered four runs in innings pitched. Poppen was released by the Mariners organization on April 5.
On April 26, 2024, Poppen signed with the Gastonia Baseball Club of the Atlantic League of Professional Baseball. In 12 games for the team, he logged a 5.11 ERA with 35 strikeouts across innings pitched. On June 17, Poppen was released by Gastonia.
On January 29, 2025, Poppen signed with the Tecolotes de los Dos Laredos of the Mexican League. Poppen made three scoreless appearances for Dos Laredos, recording five strikeouts across innings pitched.
On April 28, 2025, Poppen signed a minor league contract with the Los Angeles Angels. In 22 appearances split between the rookie-level Arizona Complex League Angels and Double-A Rocket City Trash Pandas, he accumulated a 3-4 record and 5.34 ERA with 38 strikeouts across innings pitched. Poppen was released by the Angels organization on August 2.
In 2016 Poppen graduated (with honors) from Harvard, double majoring in Chemistry and Physics, and Engineering Sciences.