As I understand it, the case is usually assigned to the justice in charge of the circuit.
https://www.supremecourt.gov/about/circuitAssignments.aspx
Roberts has the 4th Circuit (wherein Maryland is)
Southern Maryland is composed of the counties on the Western Shore of the Chesapeake Bay including Calvert, Charles, and St. Marys counties.
Okay, so that means that it was denied by Roberts. It pays to keep on digging. 8>)