“Cricket is basically baseball on Valium” is a line attributed to American comedian Robin Williams (1951-2014) at a performance at the London Palladium on December 5, 1987. Williams did not like cricket. The line has been frequently cited, but the actual words are:
 
“We have baseball. You have cricket, which is like baseball on Valium.”
   
     
Wikipedia: Robin Williams
Robin McLaurin Williams (July 21, 1951 – August 11, 2014) was an American actor and stand-up comedian. Rising to fame with his role as the alien Mork in the TV series Mork & Mindy (1978–1982), Williams went on to establish a successful career in both stand-up comedy and feature film acting.
 
10 January 1988, The Plain Dealer (Cleveland, OH), “Script,” pg. 5-H, col. 1:
Williams himself, who was just back from England where he appeared before Prince Charles and Princess Diana on Dec. 5 in a benefit at the London Palladium for the Prince’s Trust (he noted that the prince laughed heartily when he described cricket as “baseball on Valium”), was at a loss to explain the connections.
 
25 May 1988, Marietta (GA) Daily Journal, Joan Hanauer tv column (UPI), pg. 4B, col. 1:
Cricket, he (Robin Williams—ed.)  said, was basbeall on Valium.
 
Google Books
Let’s Go: Britain & Ireland
By Let’s Go, Inc.
New York, NY: St. Martin’s Press
1993
Pg. 141:
Cricket, which Robin Williams has likened to “baseball on Valium,” remains a confusing spectacle to most North Americans.
   
Google News Archive
7 August 2005, The Blade (Toledo, OH), “Cricket Crazy” by Ryan E. Smith, pg. B6, col. 1:
But he can’t get enough of the gentlemen’s sport that comedian Robin Williams once called “baseball on Valium.”
 
Google Books
Late, Late at Night
By Rick Springfield
New York, NY: Touchstone (Simon & Schuster)
2010
Pg. 43:
Cricket
The sport, not the insect. It’s like baseball on Valium. I never liked the game, and when I get hit hard in the breastbone with a solid red leather cricket ball during a school match, ...
   
Google Books
The 2,320 Funniest Quotes:
The Most Hilarious Quips and One-Liners from AllGreatQuotes.com
Edited by Tom Corr
Berkeley, CA: Ulysses
2011
Pg. 363:
Cricket is basically baseball on valium.
—Robin Williams
 
Google Books
Oxford Dictionary of Humorous Quotations
Edited by Gyles Brandreth
Oxford: Oxford University Press
2013
Pg. 71:
Cricket is basically baseball on valium.
Robin Williams 1952– American actor; attributed
 
YouTube
Talking With David Frost Featuring Robin Williams (1991)
Hugh MacEachern
Published on Aug 11, 2014
You have cricket .. which is like baseball on valium .. Yes!
0:10
“We have baseball. You have cricket, which is like baseball on Valium.”