Jonas Fredrik Björler (born 26 February 1973) is a Swedish musician and the bass player of the melodic death metal bands At the Gates and The Haunted. He was formerly in the bands Demolition, Infestation and Terror. Discography Demolition Hordes of Evil (demo) (1987) Infestation When Sanity Ends (demo) (1990) At the Gates Björler was the original drummer of the band due to being the drummer of the previous band Infestation, but it was soon discovered that he wasn't able to drum for the band and became their bassist instead. Along with Tomas Lindberg and Adrian Erlandsson, he is one of the original members left in the band. Gardens of Grief (EP) (1991) The Red in the Sky Is Ours (1992) With Fear I Kiss the Burning Darkness (1993) Terminal Spirit Disease (1994) Slaughter of the Soul (1995) Suicidal Final Art (compilation) (2001) At War with Reality (2014) To Drink from the Night Itself (2018) The Nightmare of Being (2021) Terror Demo '94 (1994) The Haunted Formed after the split-up of At the Gates in 1996. Björler is a founding member together with Patrik Jensen and Adrian Erlandsson. Demo '97 (1997) The Haunted (1998) The Haunted Made Me Do It (2000) Live Rounds in Tokyo (2001) Caught on Tape (2002) DVD One Kill Wonder (2003) Revolver (2004) The Dead Eye (2006) Versus (2008) Unseen (2011) Exit Wounds (2014) Strength in Numbers'' (2017) References External links The Haunted homepage At the Gates homepage Swedish heavy metal bass guitarists The Haunted (Swedish band) members 1973 births Living people At the Gates members 21st-century bass guitarists