What is the odd one out?

[Stockethill]

a. Football. b. Rounders. c. Cricket. d. Rugby.

[boxtops]

The shape of a rugby ball is oval, all the others use round balls. ??

[Stockethill]

I did think of that answer boxtops but it just seemed too obvious. Thanks for replying.

[kev1]

It might be that the other 3 have a set number of players whereas rounders doesn't, you can have 6 a side or 10 or 14 etc

It might be that cricket can be played over several days the other 3 can't

[beejay1124]

no world cup in rounders ?

[factor-fiction]

Cricket because it has umpires rather than a referee ?

[greenfingers]

I am an umpire for rounders so I don't think that can be the answer.

[Stockethill]

Thanks to kev 1, beejay1124, factor 30 and greenfingers for your input. I think I'll settle for the answer from boxtops. Thanks again.

[factor-fiction]

Yes, boxtops is right. Rugby is a game played by men with funny shaped balls.
Greenfingers- I thought rounders had a referee (who is then supported by 3 umpires). My point was that rounders, rugby and football had referees whereas cricket normally doesn't (exception being test matches I think which has umpires plus a match ref). Anyway i was being obtuse and keeping the thread going because boxtops clearly had the right answer.

[Stockethill]

Factor 30 I loved your second sentence. ( had a good old giggle)