Easton Oliverson from Utah was seriously hurt when his family says he fell from a bunk bed at the start of this year's tournament.
A Philadelphia law firm filed the lawsuit saying the upper bunk failed to have proper railing to protect him.
The suit blames Little League for having the beds and sues Savoy Contract Furniture in Montoursville for making them.
It seeks at least $50,000, plus punitive damages.
On Monday, Easton's family posted on Facebook that he is back home and adjusting to recovering away from the hospital.