In the year 2021, the average was 61.00 for 15 Tests.
The International Cricket Council named England captain Joe Root the men's Test cricketer of the year.
The third most runs in a calendar year in Tests was hit by Root in 2021.
He scored two double centuries and a further four hundreds, including three in successive Tests against India.
New Zealand bowler Kyle Jamieson was one of the nominees.
"I am incredibly proud to receive this award, it is a great honor," said Root, who is the second Englishman to win the award.
England's Tammy Beaumont was named women's Twenty20 international cricket of the year on Sunday.
England won just four of 15 Tests in the year, including the series against India and New Zealand, but the man of the match was Joe Root.
He scored more than three times as many runs as any of his teammates and averaged more than 60 from 29innings.
He began the year with two centuries, the first of which was 218 in the first Test against India in Chennai, his 100th Test.
In the first Test, Root hit a century, not out in the second and 121 in the third, while India were in England.
In a calendar year, only Pakistan batter Mohammad Yousef and West Indies legend Viv Richards have scored more than Root.
He was unable to score his first century in Australia despite scoring 89 in the first Test.
If there was one hundred, it would be in Chennai against India.
It is my 100th game and it will live long in the memory.
The Sir Garfield Sobers Trophy is an award for performances across all formats.