Whitehead’s tweets included several expletives and in one he used a derogatory racial term.
The 26-year-old player started the game in place of safety Damarious Randall, who missed his second straight game because of a hamstring injury. Whitehead missed tackles on two big plays by the Broncos.
He declined an interview request following the game and then went on Instagram to voice his frustration.
“Crazy world. They line it up and say anything in the book too you,” he wrote. “They tell you take the high road, when yo whole life you was taught to meet fire with fire. I do apologize for my performance, but having a broke hand and a strong fear of letting my team down is my downfall.
“Whatever happens happens. Ain trippin. They probably gone still talk crazy but this me getting smoke off my chest. I don’t need one like.. this from me to me! Keep ya head up homie.” He then added crudely that “nobody” can intimidate him: “I dare em to try.”
Whitehead was in his second season with Cleveland. The Browns signed him last year after he was waived by the Green Bay Packers two days after he was ejected for throwing a punch against New England.
The Browns (2-6) have lost four games and first-year coach Freddie Kitchens is facing heavy criticism.