Twentyman stood 5 ft 11 in (1.80 m) and was a strong, robust player who made his name at Carlisle as a centre-back having been switched there by Bill Shankly during his spell as Manager of the Brunton Park club.
He was spotted by Don Welsh who signed him for Liverpool in December 1953 for £10,000, he made his debut the same month on the 19th in a league match against arch rivals Manchester United at Old Trafford.
After his retirement Twentyman had a short four-month spell as the boss of Hartlepool United before being replaced by Brian Clough.
It was in this role that Twentyman made his name at Liverpool discovering such talents as Ian Rush at Chester (£300,000), who became captain and ended up Liverpool's all-time record goalscorer; Phil Neal at Northampton Town (£66,000), who became skipper and won the most medals by a single player in the Reds history; and Alan Hansen at Partick Thistle (£100,000), who also became club captain and won numerous domestic and UEFA honours to name but 3.
Twentyman eventually spent 21 years in the role working for the likes of Bob Paisley, Joe Fagan and Kenny Dalglish, he finally left in 1986.