Can we draw the following hypothesis from the context? 

Context:

Stryper is an American Christian metal band from Orange County, California. The group's lineup consists of Michael Sweet (lead vocals, guitar), Oz Fox (guitar), Tim Gaines (bass guitar), and Robert Sweet (drums). In 2004, Gaines left the band and was replaced by Tracy Ferrie (bass guitar) but rejoined in 2009, only to be fired after tension between the band, Gaines and his new wife.

Hypothesis: Stryper was one of the leading Christian singers in 2004.
It's impossible to say