I'm starting a blog and have many unique articles. I need to collect images from around the internet to use as the blog thumbnails and such on the blog. If I were to open a sports blog and put a image of a logo or picture of a player I find on the internet, would that be legal?
The copyright to a picture is owned by the person who took the picture, unless it is a "work for hire" under a contract to take pictures for someone else. If a picture is already on the Internet, then the copyright is owned by someone else and you are violating copyright law to use it on your site. There are sites where you can buy pictures and pay a small royalty. Put "stock photos" in your browser and these sites will come up.