Jamison joined Survivor in 1984 after his former band Cobra broke up and Survivor's then-lead singer, David Bickler, was forced to leave the group due to polyps on his vocal chords shortly after their band's biggest hit, "Eye of the Tiger," from Rocky III. Jamison stayed with the group until 1989, singing on tracks such as "The Moment of Truth" from The Karate Kid, "The Search Is Over," "Is This Love" and "Burning Heart" from the film Rocky IV.
Jamison also co-wrote and sang the Baywatch theme song, "I'm Always Here."
Following Survivor's disbandment, it later reunited without Jamison in 1993 as the original lineup with Bickler singing. Legal issues followed, as Jamison toured under the Survivor name as well. The band resolved the issue finally, and more recently toured with both Jamison and Bickler.
Survivor had performed in Morgan Hill, Calif. on Saturday night and were scheduled to begin another tour on September 12 in Parker, Colo.