How do I get into sports journalism?

You can work to start a career in sports journalism right now. Does your school have a TV station or a newspaper/newsletter? If so, start there. If not, go to your local paper, or any local paper/website that covers any aspect of sports and volunteer to be a freelance sports writer for whatever "beat" they need help with. But before you do that, you should be able to write about sports, at least a little bit. If you're not sure how to do that just yet, then start reading sports articles every day. Read the articles in your local media, but also read national writers like those on ESPN.com, Sports Illustrated, New York Times, etc. And after you get a gig as a freelancer, start reading articles others have written about that sport or those sports you've been assigned to cover. You don't want to copy those people, but you want to get a feel for how they cover the sport and then incorporate your own personality and style. And then ask for feedback all the time.
Once you're good at covering what you're assigned (based on feedback from your editor and trusted friends/family), then ask to cover something bigger, maybe a sport you're particularly passionate/knowledgeable about. Or maybe move on to a publication with a larger audience. Lastly, take journalism classes in college and be a sponge when you're around people who have been in the business a while. Always be working to get better.
That's not necessarily the silver bullet answer, but it's definitely a good way to get started and then grow from there.

Check the link below.

http://www.wikihow.com/Become-a-Sports-Journalist