[Jim65]

Originally Posted by doug.goodman

Only partially true.

While it's true that he didn't give up a grand slam, he gave up consecutive homers on five different occasions :

June 23, 1970 (N) at Fenway Park, Red Sox
5th inning
Conigliaro & Petrocelli

July 10, 1973 (N) at Memorial Stadium, Angels
4th inning
Oliver & Stanton (1st of 3 in game, 2 off Palmer)

June 9, 1977 (N) at Fenway Park, Red Sox
3rd inning
Lynn & Rice

April 19, 1980 (N) at Memorial Stadium, White Sox
7th inning
Morrison & Baines

September 1, 1983 (D) at Exhibition Stadium, Blue Jays
4th inning
Whitt & Barfield

I got my info from Wikipedia, I should have known better.