When you talk about more than one thing/person, it does not take apostrophe.
For instance, if there are four Managing Directors, you take 'M', 'D' and that little 's' without apostrophe.
Apostrophe suggests possession. So, if you are talking about something that belongs to those four MDs, you need apostrophe
MDs' (Managing Directors') cars or MD's car (Managing Director's car)
Now, here it's a tricky question...but the way to write it is...
...more than 25 one-dayers
Or, internationally, it's ...
...more than 25 ODIs (One Day Internationals)