It got me thinking whether they do sports betting or not and uses whatever inside information they have.
Where did you get the information, that sports journalists have inside information? Just because they have a press badge and can enter behind the scenes it does not mean they know more than a regular sports fan. In big sport, where big money are, nobody would share extra information besides team. But, as sports journalists spend 24/7 with sport they like, I do think that their chances of correct prediction are higher than regular bettor has.