Blum also was the Referee for the 1997 AFC Championship, which would be his highest game worked at the Referee position. Blum moved back to line judge beginning with the 2004 NFL season, and worked his last four seasons on the crew of referee Tony Corrente.
Blum served as the Referee for the 1997 AFC Championship, which was his most notable game officiated in that position. After this, he returned to line judge duties beginning with the 2004 NFL season and worked his final four seasons alongside referee Tony Corrente's crew.