A Lawrence man Thursday pleaded guilty to driving under the influence and child endangerment in connection with a September accident in which his 12-year-old son fell out of the bed of his pickup truck.

Juan Alonzo Velasco, 40, entered the plea Wednesday to his third DUI, which is a felony, as prosecutors agreed to reduced one of the child endangerment charges from a felony to a misdemeanor.

“I drove under the influence with my boys in the back” of a pickup truck, Velasco said during the hearing.

According to police, Velasco’s estimated blood-alcohol content after the accident was 0.218, more than 2.5 times the legal limit of 0.08.

The charges were filed in November after the man’s 12-year-old son fell from the back of Velasco’s pickup truck at 9:30 a.m. Sept. 25 while he was trying to secure a basketball goal in the truck.

The accident occurred while Velasco was driving in the 1900 block of East 30th Street, which is south of Prairie Park Nature Center. The truck hit a bump in the street, and the boy and a portable basketball goal fell from the back of the pickup.

The boy was eventually taken to Children’s Mercy Hospital in Kansas City, Mo., where he stayed for more than a week. Velasco’s 16-year-old stepson, who also was in the back of the truck, was not injured.

Defense attorney John Frydman said as part of the plea agreement both sides would ask District Judge Paula Martin to give him the minimum sentence of 120 days in jail.

Michael Allen, an assistant Douglas County district attorney, said prosecutors would recommend the judge order him to pay a $1,500 fine as well.

Frydman said the defense would also ask Martin to allow Velasco to qualify for work release during his jail sentence.

Martin ordered Velasco undergo an alcohol evaluation before she is scheduled to sentence him March 18.