Villalobos, 26, pleaded guilty to trespassing and will stay in a mental health facility as part of his conditional discharge, the New York Daily News said.
Villalobos leaped from a passing monorail in September 2012 and climbed a fence to reach the den.
He was able to pet the 11-year-old tiger, Bachuta, before being attacked.
Zoo employees used a fire extinguisher to drive the animal away, but Villalobos suffered a broken right shoulder, right ankle, rib and pelvis, and a punctured lung.
When police asked him about his motive at the time of the incident, Villalobos said that he wanted to be one with the tiger, the Daily News reported.
Notable deaths of 2014 [PHOTOS]