Henry Oswald Simmons Jr born July 1 1970 is an American actor best known for portraying Alphonso Mack Mackenzie in the ABC superhero drama series Agents of SHIELD 20142020 and Baldwin Jones in the ABC police drama series NYPD Blue 20002005 His first acting job was the movie Above The Rim He made his TV debut in a Saturday Night Live skit that infamously starred Marin Lawrence He then got numerous guest star roles on television in film and made his New York theater debut in William Inges Boy In The Basement This led to a continuous role on the soap opera Another World where he worked for two years He then moved to Los Angeles and went on to star on NYPD Blue for six seasons