[1] Slagel received a call from Lars Ulrich—who had not formed a band yet—who asked if he could record a song for the album, which he accepted.

[1] Using borrowed money from his friends and family, Slagel pressed either 2,500 or 5,000 copies of Metal Massacre.

[6] On August 29, 2017, BMG Rights Management published The Sake of Heaviness: The History of Metal Blade Records, a book on the label's history, co-written by Mark Eglington and the label's founder Brian Slagel.

[7] In 2019 Metal Blade Records opened a store in Las Vegas, Nevada that sold rare and out-of-print items from them and their artists.

[8] Current and former artists per Metal Blade Records' website, as of November 2024[update].