Catchers with the most HR in age-21 season or younger: Johnny Bench: 26 (1969) , @franciscoalvarez.13: 25 (2023). 👀 h/t: @slangsonsports

Catching Statistics: Complete List of Catcher Stats (2023 Update)

Johnny Bench 20 Facts About The Legendary Catcher

Encyclopedia of Baseball Catchers - HOF Johnny Bench

Johnny Bench, an All-Time Great MLB Catcher, Has a Surprising Net Worth

Baseball For The Love Of The Game - Ron Hassey Catcher Born: February 27, 1953 (age 63) Tucson, Arizona Batted: Left Threw: Right MLB debut April 23, 1978, for the Cleveland Indians

Catching Statistics: Complete List of Catcher Stats (2023 Update)

Catch You Later: The Autobiography of Johnny Bench by Johnny Bench

The 10 best MLB catchers of all time, ranked

Francisco Alvarez now trails Johnny Bench by 3 for most homers in age 21 season or younger by a catcher : r/baseball

Encyclopedia of Baseball Catchers - Miscellaneous Lists of Catchers

Sarah Langs on X: most HR in age-21 season or younger, AL/NL catchers: 1969 Johnny Bench: 26 1973 Darrell Porter: 16 1968 Johnny Bench: 15 2023 Francisco Alvarez: 12 / X

MLB – 1975 – Strohs Circle Of Sports Special – Reds C Johnny Bench Takes A Walk Down Memory Lane – ImaSportsphile