"I'm uncomfortable -- I feel it's too light -- but seeing that the victim agrees with this disposition and doesn't want to go through the ordeal of a trial, I'm going to accept it," Fandrich said.
Peckham, of 9878 Baker Road, Cato, admitted the incident happened in Cato between February and April 2006.
Cayuga County District Attorney Jon Budelmann said a second victim, who is now in his 40s, came forward with the 14-year-old, but additional charges could not be filed because the statute of limitations had expired since that incident allegedly occurred in the 1970s.
The older victim knew the 14-year-old and urged him to tell police about Peckham, Budelmann said.
No other victims came forward after the Cayuga County Sheriff's Office arrested Peckham last year, Budelmann said.
Peckham worked as a social worker with the Oswego school district from 1981 to 1992 and was also involved in area mentor programs, investigators previously said.
Peckham will be sentenced for third-degree criminal sex act, a felony, on May 25.