A judge in Nacogdoches on Monday sentenced Anthony Watts.
Watts in January pleaded guilty to felony injury to child over the 2010 incident that left ZaTaurean Pleasant critically hurt.
The Nacogdoches Daily Sentinel reports court testimony indicates Watts has a diminished mental capacity. Prosecutors say the man was under the influence of marijuana when the boy was burned over 70 percent of his body.
Doctors say the boy, who recently turned 4 years old, still has scars but has grown into a healthy child.