Stefon Diggs paid a special tribute to the late Michael K. Williams during the Bills' season opener on Sunday ... rockin' some incredible "The Wire" tribute cleats while on the field.
The heat feet were white and black with blue laces ... and they featured painted-on characters from "The Wire," including Williams' iconic Omar Little.
On one of the spikes, the cleat artist -- Mache -- also painted on the words "A Man Must Have A Code" .