One of the most important parts of being a journalist is having quality resources for research, pictures and anything else you could want. Below I have listed and described some resources I use, and I highly recommend checking them out.
LoL eSports is Riot Games’ official League of Legends eSports website. Aside from their own content that one could look to for inspiration, this website has a number of useful resources. The schedules for every region can be found here along with international tournaments hosted by Riot. Do you want to check out VoDs of any of the games you missed? They have that too. You can view statistics by player, role, team or region. Pretty much anything you want is on this website.
Oracle’s Elixir has tons of in depth statistics for every player, champion and team across all of the major regions. It is a lot more in-depth than LoL eSports. This website also has match data files in their tools section. They also have a lot of great content on analysis and theory. If you are looking for really detailed information or analysis, this is one of the best places you can go.
The LoL eSports Flickr is an absolute blessing to have as someone who is not able to visit a lot of live competitions. Their pictures are copyright free to use, and there are tons of them. Almost every image on my website is from this Flickr account. Every event that occurs adds tons of new pictures of players, stages, crowds and so much more.
Op.gg is my go-to source for solo-queue scouting. Do you want to know how many ranked games Faker played on Leblanc this season and what his KDA was? This is a great place to find out. They also have ranked champion statistics available. There are quite a few different website that offer this service, but this is the one I have used for quite some time and it seems to be generally accepted as the best one.
I hope this has been helpful. These should cover just about any research you could ever need related to League of Legends.