The sport of “boxing” doesn’t have anything to do with cardboard boxes, but there are jokes. A cardboard riddle has been cited in print since at least 2016:
Q: What is cardboard’s favorite sport?
A: Boxing.
Twitter
🌸✨
@heizeing
whats a cardboard’s favorite sport?
boxing 
10:50 AM · Sep 14, 2016·Twitter for Android
Reddit—Jokes
Posted by u/sketchbreaker October 5, 2017
What is cardboard’s favorite sport?
Boxing
Twitter
me
@not_actuallyme
What is cardboard’s favorite sport? via /r/Jokes http://ift.tt/2yKeIRm
12:43 PM · Oct 5, 2017·IFTTT
Reddit—Jokes
Posted by u/raykendo August 11, 2019
What is cardboard’s favorite sport?
Boxing
-brought to you by my 8-year-old son
Reddit—Dadjokes
Posted by u/AJ-Naka-Zayn-Owens September 24, 2019
What is a cardboard’s favourite sport?
Boxing
Twitter
Dave Goulden
@davemgoulden
What’s a cardboard’s favourite sport?
....Boxing
Admit it, you laughed
12:31 PM · Sep 29, 2019·Twitter for Android
LaffGaff
By laffgaff December 24, 2019
Favorite Sport Joke
What is cardboard’s favorite sport?
Boxing.
Above, a 1934 plaque from the Big Apple Night Club at West 135th Street and Seventh Avenue in Harlem. Discarded as trash in 2006. Now a Popeyes fast food restaurant on Google Maps.
Recent entries:
•
“Instead of conspiracy theorist, I prefer to be called a connect the dots specialist” (3/20)
•
“Let’s reduce drunk driving by taking cars away from sober drivers” (3/20)
•
“When the Berlin Wall fell, which side did the people run to?” (3/20)
•
“You are being conditioned to give up your rights every time there’s a crisis” (3/20)
•
Entry in progress—BP (3/20)
More new entries...
Above, Big Apple Corner at 54th Street and Broadway in Manhattan. Google Maps.
Above, John J. Fitz Gerald, from the Aug. 15, 1931, Binghamton (NY) Press, pg. 14.
Listen to Robert Emmerich introduce "The Big Apple," a hit song from 1937. Music written by Bob and performed by Tommy Dorsey's Clambake Seven with Bob on piano. Lyrics written by Buddy Bernier and sung by Edythe Wright. Audio provided by Dorothy Emmerich.
Also listen to a 1937 "The Big Apple" song by Ozzie Nelson and his Orchestra. See a 1929 photo of John J. Fitz Gerald and a 1931 photo of John J. Fitz Gerald.
This site is edited by Barry Popik.