There are at least 5 artists using this name (and one additional band formed with this name):

1) Sorcerer is one of the very first heavier metal bands from Sweden. Sorcerer was a doom metal band that was formed in 1984 but it took them till 1988 to get their first demo recorded. A second was released in 1992. In 1995 a full-length CD was released - yet with a load of tracks from their 1992 demo. A vinyl piece saw the light early 2004 with the Inquisitor demo and two bonustracks, this release was limited to 700 copies only.
http://www.metal-archives.com/band.php?id=5906
http://www.myspace.com/sorcererswe

2) Sorcerer is a one man (Daniel Saxon Judd) space disco/balearic/yacht-rock outfit from California with releases out on Tirk recordings.

3) Sorcerer is an epic modern thrash/groove metal band from Poland (Kielce), focused on propagating unique Slavonic musical vision. Sorcerer's lyrics tell us about epic battles, power of Polish Husarya, Slavonic legends, etc Official website: www.sorcerer.bandcamp.com

4) A trance / hard trance project by Oliver Kirwa. His releases have been picked up by the popular hardcore collection Thunderdome and were featured on a few Trancemaster compilations.

5) US metal band from Cleveland released two songs in compilations named
"Strike of the Raven"&"Bloodline".

6) The Pasadena, CA heavy metal band "Holy Grail" was founded under the name "Sorcerer", born out of the band "White Wizzard". Holy Grail did not release any material as Sorcerer, but did record demos using that name. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.