STEMM is an American heavy metal band from Niagara Falls, New York. STEMM was formed in 1998 by Joe Cafarella and Jimi Penque, along with Louis Penque, Russ Martin, and Alex Scouten, made up the original lineup of the band. Alex left the band in 1999 and was briefly replaced by guitarist Fred Blackwell. Rich Spalla replaced Fred shortly after. This lineup remained intact until 2003. Joe and Rich merged with drummer Danny Nelligan, bassist Stephen Crowl, and vocalist TJ Frost of Buffalo band 5 Years Gone, to create a new incarnation of the band. This lineup also saw a change in the musical direction of the band from hardcore/rap to more of a metalcore act. This lineup's first two shows were a showcase for Metal Blade Records, opening for major act, Sevendust. The band performed on many Jägermeister Tours overtime, opening for major/large acts such as Hatebreed, Chimaira, Staind, Godsmack, Soulfly, Trivium, Arch Enemy, and Black Label Society. STEMM also played the last full show of Dimebag Darrell in Buffalo, NY, the night before he was killed on stage in Columbus, Ohio. STEMM began a hiatus on December 1, 2012.