With out blatantly "hating on" or "H8ting" "sports" -which would seem bitter or "angsty" coming from a repressed perspective. Using the word "Sportz" is a way for those who grew up not doing sports, nerds, geeks, art-kids, theater kids, dorks, and all other non-athletic persons to finally appreciate "sportz" in an indirect ironic way.
"the humans are doing sportz today"
" the game is on" #sportz - if used on twitter
As in the portrayal of the use of the word "Sportz" in the Youtube video "We Like Sportz" by The Lonely Island produced by Andy Samberg