Efren's EVERYDAY warm-up is to start with ball in hand and run 3 racks of 15 ball rotation in a row...doesn't make any difference if it takes him 3 hours or does it on the first try,that is his routine.
Supposedly,Jimmy Reid ran 7 racks and out in 2 consecutive sets then started his next match with 6 in a row at what used to be the Super Bowl tournament at The Rack in Memphis,this was said to be in the late 80's.
At the same place in the early 90's,I watched an "artificially assisted" Danny Cook break and run out an 8-ahead set gambling on a bar box in about 12 minutes. For a LONG time after that,I honestly thought Danny was the best bar box player on Earth.
Word is Matlock was at LEAST the 8 or the 7 better than that,so it wouldn't surprise me if the stories about him running 20-something were on the level.
NO one saw the whole thing because it took like 5-6 hours,but an insanely talented 14.1 player named Mike Eufemia supposedly ran 654 balls at one time. This is a guy so strong that Grady told me the regulars where he played would bet he ran 200 EVERY NIGHT OF THE WEEK,and he did it for a friggin' DECADE.
Alex ran 14 racks of 10 ball with respots at JOB's in Nashville for THE CASH playing the ghost,with the ghost on the hill...Tommy D.