Most strikeouts by a batter in a season
Colson Montgomery, 227 in 2026.
Colson Montgomery struck out 227 for the Chicago White Sox in 2026, the MLB record for strikeouts in a season. Next: Mark Reynolds (223, 2009) and Adam Dunn (222, 2012).
In 2026: Colson Montgomery (Chicago White Sox) led MLB with 227, the record.
Most strikeouts by a batter in a season: the top 25
More than once in the top 25: Mark Reynolds 3 times, Chris Carter 2 times, Chris Davis 2 times, Joey Gallo 2 times and Kyle Schwarber 2 times.
Every team's record
Each franchise's best season, including the years it played under another name or in another city.
Questions
What is the MLB record for strikeouts in a season?
227, by Colson Montgomery of the Chicago White Sox in 2026.
Who led MLB in strikeouts in 2026?
Colson Montgomery of the Chicago White Sox, with 227. That is the record.
Who has the most seasons among the top 25 for strikeouts?
Mark Reynolds, 3 times (2008, 2009 and 2010).
Which team's own strikeouts record is the highest?
Chicago White Sox: Colson Montgomery, 227 in 2026. The lowest club record belongs to the St. Louis Cardinals, 174 by Jordan Walker (2026).
Which numbers count?
Batters' strikeouts. MLB's official records, which since 2024 include the Negro Leagues from 1920 to 1948.