Buzzsaw was introduced in Captain America 373, cover date July 1990. He was created by Mark Gruenwald and Mark Bagley. ("After Blow" "Fists of Truth" Captain America 373, Marvel Comic Event)

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Buzzsaw was introduced in Captain America 373, cover date July 1990. He was created by Mark Gruenwald and Mark Bagley. ("After Blow" "Fists of Truth" Captain America 373, Marvel Comic Event)
So John here had a manager, as well as his BUCkies... and he wanted to bring them on to the team... but the Commission is adamant, no manager and the BUCkies who have criminal records are also a no go... but despite that, John still takes the job.
The Streets of Poison story arc ended in Captain America 378, cover date October 1990. The second story in the issue introduced (in shadow) Kate Walker, who was created by Mark Gruenwald and Mark Bagley. The first story ended with the Kingpin beating Red Skull in a brawl and Captain America beating up Crossbones. ("Grand Stand Pluy" "Grave Concerns" Captain America 378, Marvel Comic Event)
The people John used to roll with are threatening to expose his secret identity, so Lemar and he steal a pair of guardsmen outfits and go send his old friends a message...