I know it is 1.3 million to 1 to have two players of the same foursome make a hole in one in the same round. Brag: Buddy and me did that last year, that's how I know, according to golf digest. I imagine its close to that but a little less since it's not the same round. Double eagle of course is less likely, but sounds like shorter than usual par 5's.
http://www.golfdigest.com/blogs/the-...-they-are.html
A double eagle is said to be like 1 million to 1 so....