Good sports content writers should not only have knowledge about a particular sport, but they should also have interest and enthusiasm for it. If you have done your Phd in basketball, but never played it, never had the fun of a hard fought win, or the chagrin of defeat, you will not know how to write about basketball. You will not know how to convey the nail biting tension of the game.
Sports is a vast field of writing. Our world has almost ten thousand (10,000) distinct sports played by people as varied as the Maoris, the Innuits, the Saharan nomads, Bedouins of the Arab deserts and Buddhist monks of the high mountains of the Himalayas. It is not possible for a single person to know about all these sports, far less to write about them.
However, when broken down by country, the area of focus becomes much less, because only a few very specific sports are actually popular in any country. Even for a country as multi-racial as the US, only a handful of sports are actively played. These include basketball, football, baseball – the big three; and tennis, golf, cricket, soccer, ice hockey, skiing and a few others. It is possible for a single sports content writer to know about and actively engage in all these various sports. In such a case, that writer will be ideal for covering all these sports for a sports content website.
When writing about sports, make sure to use language that is enthralling. Try to get into the shoes of a sports commentator in the gallery, someone who is watching the game live. That will give you the kind of real-time language that you will need to write good sports content. A bit of opinion and background material can be thrown in usefully.