![[title] - Uncanny X-Men (1st series) #31](/sites/default/files/images/covers/uncannyxmen/uncannyxmenv01-031.jpeg)
X-Men (1st series) #31
first appearance
![[title] - noimage](/sites/default/files/images/covers/misc/noimage.jpg)
Incredible Hulk (2nd series) #173
mutates after exposure to radiation
Incredible Hulk (2nd series) #174
explodes battling Hulk in space
Defenders (1st series) #42
recovered by Egghead and brainwashed
![[title] - Defenders (1st series) #43](/sites/default/files/images/covers/defenders/defendersv01-043.jpeg)
Defenders (1st series) #43
regains his senses and seemingly kills himself and Egghead In implosion
![[title] - Civil War #1](/sites/default/files/images/covers/mini/civilwar1.jpg)
Civil War #1
unidentified Cobalt Man in Stamford
![[title] - Captain Marvel (6th series) #2](/sites/default/files/images/covers/captainmarvel/captainmarvelv06-02.jpeg)
Captain Marvel (6th series) #2-4
Skrull imposter of Cobalt Man
Thunderbolts (1st series) #112
American Eagle defeats Cobalt Man imposter
![[title] - Avengers Academy #10](/sites/default/files/images/covers/avengers2/avengersacademy10.jpeg)
Avengers Academy #10
Cobalt Men fight Speedball at Stamford memorial
![[title] - Deadpool & the Mercs for Money (2nd series) #3](/sites/default/files/images/covers/deadpool2/deadpool-mercsformoneyv02-03.jpeg)
Deadpool & the Mercs for Money (2nd series) #3
Ralph Roberts apparently alive again as Cobalt Man