Sport and other 86,400 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
It's the drawing of a football. The football is diagonal as if it has been thrown. The outline of the football is an oval, and there is a line inside of the oval with hash marks across it to indicate the threads of the football.