DC v DC Heavyweight Boxing

[theheavyweightshtick]

Superman v. Martian Manhunter
Wonder Woman v. Black Adam
Aquaman v. Kilowog
Lobo v. Orion

[beatboks]

Superman v. Martian Manhunter
Wonder Woman v. Black Adam
Aquaman v. Kilowog could go either way
Lobo v. Orion if it wasnt just a punch up could go the other way

As per the bolded

[Jackalope89]

Superman v. Martian Manhunter
Wonder Woman v. Black Adam
Aquaman v. Kilowog
Lobo v. Orion

MM (hard to hit something if your punches just go through them)
Leaning towards Diana, but this one is the hardest of the group.
Aquaman. Kilowag is a great GL, but without the ring, Aquaman takes it.
Lobo. Orion is a tough cookie, but Lobo is a pain to deal with on the best days.

[Powerboy]

Superman v. Martian Manhunter: With MM unable to use his telepathy, phasing and so on, Superman has this. Then again, you didn't specifically say he couldn't use them but I think it's implicit.
Wonder Woman v. Black Adam: Yes, people tend to underestimate WW but, in this case, a sheer punching contest, Adam should have it. I'm picturing Post-Crisis versions. Versions may vary.