Hi Bobby. Hope you're well. Yes, Jack and I were close, even traveling together to a couple of Eastern States tour events in the 1970's, and he never mentioned this. The most I ever saw him run was in the 240's in the 1970's. I've heard others claim he ran over 300, but I cannot verify that this is true.
Oddly enough, the matter of what constitutes a run is sometimes in need of a little interpretation. I recall hearing once that Mike Eufemia ran 750. Again, this seemed rather unlikely, as my father and I knew Mike personally, and he'd never mentioned it. Then, one day, I had a chat with famed pool referee Cue Ball Kelly, and I asked him about it. Still curious about this, in October 2007, I posted about my chat with Cue Ball Kelly as follows:
So now, after this chat with Cue Ball Kelly, a dialogue that took place in about 1980, I believed that Eufemia had run 150 and out in five consecutive tournament matches, and that's how I understood things to have gone down for over 25 years. Sure enough, even this proved mistaken, and Bob Jewett, also familiar with this accomplishment, posted the following in reply to my post:
Well, not to take away from Mike Eufemia's remarkable accomplishment, but it seems his high run on that particular day was 150, not 750!
As you can see, Bobby, in a sport having no official records, especially in the area of high 14.1 runs, it's never crystal clear who ran how many and when.
Perhaps Jack had some long stretches of practice without missing, who knows? Perhaps every rack began with a set-up-by-hand break shot. I saw Jack practice that way on a few occasions. We'll never really know for sure.