Joe Timms the Glob?

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Joseph Timms was a petty crimal who escaped from prison, to be with his dying wife. Joe Timms ran into the Florida everglades, only to sadly drown in the marshes. Decades later after the the Hulk accidentally spilt radio active waste, Joe Timms was resurrected as a swamp creature now called the Glob.

The creature mistakenly thought that Betty (Banner) Ross was his dead wife. Challenging the Hulk to a duel, which the Hulks hits did not affect him because his punches went through his muddy body. However the Glob realized that pursuing her, that he would only harm Betty Ross. He disappeared into the everglades and was not seen for some time after.