Dolgorsürengiin Serjbüdee (Mongolian: Долгорсүрэнгийн Сэржбүдээ, Japanese: ドルゴルスレン・セルジブデ, romanized: Dorugorusuren Serujibude) is a Mongolian retired professional wrestler, best known for his time with New Japan Pro-Wrestling (NJPW), where he wrestled under the ring name Blue Wolf (ブルー・ウルフ, Burū Urufu). He also competed once in mixed martial arts in 2004, defeating fellow professional wrestler Tom Howard.