Seymour is the 398th former Northwoods League player to debut in MLB
Rochester, Minn. – Former Rockford Rivet Carson Seymour made his Major League debut on Sunday, June 29, 2025. Seymour is the 398th former Northwoods League player to reach the Major League level.
Seymour, who played collegiately at Kansas State University, played for the Rivets in 2020. He was drafted in the 6th round of the 2021 MLB draft by the New York Mets.
In 2020 with the Rivets, Seymour appeared in five games and was 1-1 with a 3.20 ERA. He struck out 18 batters in 19.2 innings.
Seymour started his professional career in 2021 with the Mets Rookie level team in the Florida Complex League. He pitched in 4.1 innings and struck out four batters while allowing one earned run.
In 2022 Seymour began the year with the St. Lucie Mets of the Low-A Florida State League. After seven games he was sent to the Brooklyn Cyclones of the High-A South Atlantic League. Seymour was traded mid-season to the San Francisco Giants organization and was went to the Eugene Emeralds of the High-A Northwest League. For the year he pitched in 24 games and was 7-8 with a 3.08 ERA. He struck out 135 batters in 111 innings while walking 31.
Seymour spent the 2023 season with the Richmond Flying Squirrels of the Double-A Eastern League. Appearing in 28 games he was 5-3 with a 3.99 ERA. He pitched in 112.2 innings and had 114 strikeouts.
In 2024 Seymour moved up to the Sacramento River Cats of the Triple-A Pacific Coast League. Across 134.1 innings he struck out 132 batters and was 7-10 with a 4.82 ERA.
Prior to his call-up to the Giants, Seymour had started 15 games with Sacramento and was 3-8 with a 3.89 ERA and 83 strikeouts in 74.0 innings. In his Major League debut against the Chicago White Sox, Seymour entered the game in relief and pitched 1.0 innings allowing no runs on two hits.
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The Northwoods League is the proven leader in the development of elite college baseball players. Now in its’ 32nd season, the Northwoods League is the largest organized baseball league in history with 24 teams, drawing significantly more fans, in a friendly ballpark experience, than any league of its kind. A valuable training ground for coaches, umpires, and front office staff, nearly 2400 NWL alums have been drafted and over 395 Northwoods League players have advanced to Major League Baseball, including three-time All-Star and 2016 Roberto Clemente Award winner Curtis Granderson, three-time Cy Young Award winner and two-time World Series Champion Max Scherzer (TOR), two-time World Series Champions Ben Zobrist and Brandon Crawford and World Series Champion and Cy Young Award winner Chris Sale (ATL). As well as 2019 Rookie of the Year and 2019/2021 Home Run Derby Champion Pete Alonso (NYM) and 2023 World Series Champion, MLB All-Star, MLB Gold Glove, two-time Silver Slugger winner and two-time All-MLB first team shortstop Marcus Semien (TEX). League games are viewable live on Northwoods League+ (at watch.northwoodsleague.com), ESPN+, and the Northwoods League Network.