“In a hidden catacomb under the streets of Chinatown, SLAM BRADLEY, ace free lance sleuth, fighter, and adventurer is tangling with a mob of Celestials who resent his investigating – Knives flash! Fists fly! Altho’ outnumbered, SLAM is having a swell time!” –
Detective comics #1 (caption)
Real Name: Samuel Emerson “Slam” Bradley.
Bio here.
Could see maybe Fearless for Personality.