Brian Grant -- a 2002 MLB draft pick -- was arrested this week in North Carolina ... after authorities say he murdered a locksmith.
According to the Oak Island Police Department, officers were dispatched to Grant's home on Wednesday over a report of gunfire ... and they discovered 61-year-old Randy Stewart dead from a gunshot wound.
An investigation led authorities to believe Grant was the shooter ... and the former pitcher was taken into custody and booked on a charge of second-degree murder.