There are lots of different styles of sports graphics. Do you have an example of what you'd like to learn how to make? In the meantime, you could check out Jesús Ramirez's Photoshop Training Channel to see if there's a tutorial there like what you had in mind.
Thank you for sharing some examples. That helps. Although the subject matter of the graphics is sports related, the principles that apply to creating these images can be deconstructed into smaller concepts that apply to a wide range of images. I'd recommend that you take a look at tutorials and/or materials that cover the following topics: