5 players with the worst 50 to 100 conversion of all time in Tests 

#4 Michael Atherton (25.81%)

Michael Atherton

Former England skipper Michael Atherton was one of the gutsiest and most solid openers in cricket. He was one of the rare players who had more ducks than centuries in Test cricket (16 centuries and 20 ducks).

Steve Waugh nicknamed him ‘cockroach’ due to his stubborn nature and the simple reason that it was very hard to dismiss him. He also captained England for a record 54 Test matches which was broken by Alastair Cook last year.

The stubborn Lancashire opener though was also known for not converting his starts. He has 62 50+ scores out of which he has converted only 16 of them into three-figure scores. In fact, there was a period in 1993/94, where Atherton had 7 50+ scores in 11 innings but none of them went past 100.

Thus, he is ranked fourth on the list of worst conversion rates.