Taylor DiBart of 117 Simmons Road, McMurray, is charged with aggravated assault in the attack on Hunter Braden, 18, of McMurray.
At a news conference Friday, Peters police said Braden drove to DiBart's home and walked into the front yard about 5:20 p.m. DiBart came out of the house with a metal baseball bat and struck Braden once in the head and once in the shoulder.
Braden was later taken to a Pittsburgh hospital, where police said he is in intensive care with a fractured skull. Police are continuing to investigate but do not have a motive for the assault.