“Why are there so many baseball autobiographies?”/“Because every pitcher tells a story.”

“Every picture tells a story” is an old saying that was popularized as the title of a 1971 rock song and album by Rod Stewart. There’s a baseball pun:
 
Q: Why are there so many baseball autobiographies?
A: Because every pitcher tells a story.
 
Every Pitcher Tells a Story: Letters Gathered by a Devoted Baseball Fan was a the title of a 1999 book by Seth Swirsky. The full joke has been cited in print since at least 2012 and 2013.
 
 
Wikipedia: Every Picture Tells a Story
Every Picture Tells a Story is the third album by Rod Stewart, released in the middle of 1971. It incorporates hard rock, folk, and blues styles. It went to number one on both the UK and U.S. charts and finished third in the Pazz & Jop critics’ poll for best album of 1971. It has been an enduring critical success, including a number 172 ranking on Rolling Stone magazine’s 2003 list of the 500 greatest albums of all time[4] and inclusion in both 1001 Albums You Must Hear Before You Die (2005) and 1,000 Recordings to Hear Before You Die (2008).
 
OCLC WorldCat record
Every pitcher tells a story : letters gathered by a devoted baseball fan
Author: Seth Swirsky
Publisher: New York : Times Books, ©1999.
Edition/Format:   Print book : Biography : English : 1st ed
   
Google Books
The Mammoth Book of One-Liners
By Geoff Tibballs
London: Constable & Robinson Ltd.
2012
Pg. ?:
Why are there so many baseball autobiographies?
Because every pitcher tells a story.
 
Twitter
Southern Fried Fool
‏@thedeanjennings
Why are there so many baseball autobiographies?
Because every pitcher tells a story
8:28 PM - 27 Feb 2013