Is David Ortiz the New Yogi Berra?

Here's what the Red Sox slugger had to say recently about the sour streak his team has been on lately, endangering its playoff hopes:

“There’s nobody to blame but everybody.”

If I were a CEO, or the president of something, or someone with even the slightest responsibility for anything, I would tuck this quote in my back pocket and whip it out when things get grim.

The (Accidental?) Wisdom of Yogi Berra

I’m back to inviting readers to submit quotations whose origins they want me to try to trace, using my book, The Yale Book of Quotations, and my more recent researches.
Jordan asked:

"Okay, but did he say the quotation in question?" [i.e., did Yogi Berra actually say, "I never said most of the things I said." From three weeks ago.]

According to the ever-helpful Yale Book of Quotations, Sports Illustrated, March 17, 1986, quoted Berra as saying "I really didn't say everything I said."