Jason Robert Kanzler (born August 20, 1990) is an American baseball coach.
Kanzler graduated from Penfield High School in Penfield, New York. He enrolled at Northeastern University and attempted to make the Northeastern Huskies baseball team as a walk-on, but was cut. He transferred to the University of Buffalo and played for the Buffalo Bulls. He was named the Mid-American Conference Baseball Player of the Year in 2013.
The Minnesota Twins selected Kanzler in the 20th round of the 2013 MLB draft. He signed with the team and began his professional career.
After he retired, Kanzler became a chemistry and physics teacher at Katy High School, while also coaching their baseball team. Kanzler joined the Houston Astros organization as a minor league hitting coach in 2019 and joined the major league coaching staff before the 2022 season. The Chicago Cubs hired him as the director of their farm system in January 2024.