He is the only cricketer who scored first-class triple hundreds in three different decades (1988, 1997 and 2002).
Stephenson is easily the most successful wicket-keeper in history for Somerset, and is the county's only cricketer to have taken 1000 dismissals.
To date, he is the only Pakistani cricketer to score a century on his one-day debut, scoring an unbeaten 102.
He is perhaps the only cricketer to retire from first-class cricket, become and umpire, then later return to first-class cricket.
This Test saw Hughes become the only cricketer to hit a six on all five days of a Test match.
He is the only Nepali cricketer to take an international hat-trick.
Westfield, however, is the only cricketer charged with corruption and no one else faces criminal sanctions.
On 17 December 2009 he played his 100th Test, becoming the only black South African cricketer to reach that mark.
Fender is surely, for instance, the only modern cricketer to have fought (and won) a sword duel.
He is the only Indian cricketer to get all of them.