Alphonso "Mack" MacKenzie appeared in the Marvel Cinematic Universe (MCU) television series Agents of S.H.I.E.L.D., portrayed by Henry Simmons.

An entry for Al MacKenzie appears in issue four of the reference series The Official Handbook of the Marvel Universe Update '89.

[1] He became romantically involved with Contessa Valentina Allegra di Fontaine after a while, which led to an estrangement between him and Nick Fury.

[4] Subsequently, under unknown circumstances, MacKenzie resigned from S.H.I.E.L.D., and wrote a "tell-all" book entitled UnSHIELDed: an Unauthorized Insider's Look Behind the World's Most Powerful Global Spy Network, which purportedly explained some of the history behind the organization from his point of view.

[7] He develops a close friendship with Leo Fitz,[8] and a romantic relationship with Elena "Yo-Yo" Rodriguez.