They fought against the Avengers but later disbanded once they had found Namor.
When the Avengers first reformed after Onslaught, Stingray responded to the mass rallying call to oppose the threat of Morgan le Fay.
These "Defenders for a Day" ended up helping the Defenders against two groups of super-villains who also tried to cash in on the Defenders' name and create confusion.
He and his wife became the caretakers of Hydrobase and offered the Avengers use of the facilities.
He took the name Stingray after basing some of its design on manta rays.
After the Avengers disappeared, having being captured by the inverted and evil Avengers Unity Division, Doom tasked Valeria Richards with the mission to assemble a group of certain available heroes, including Stingray, each having specific skills which could be utilized.
The new Avengers assembled in Doctor Doom's Castle, and jumped into action when the now-evil Scarlet Witch arrived to Latveria to have revenge on Doom.
In the wake of the World War Hate, Doctor Doom's personality was inverted, along with that of numerous heroes and villains.
After having seen the errors of his ways, Doom planned to redeem himself.