Frank Grillo as Brock Rumlow (L) and Rick Flag Sr. (R) Zade Rosenthal / Walt Disney Studios Motion Pictures / Courtesy Everett Collection / Dan Steinberg / Briarcliff Entertainment / Getty Images ...

Frank Grillo, best known for playing Brock Rumlow or Crossbones in the Marvel Cinematic Universe (MCU), recently opened up about his shift to DC Studios. Currently voicing Rick Flag Sr. in DC's ...