"Obviously I don't think it's fair," Smith said after practice. "Obviously I think the commissioner made a mistake."
NFL Commissioner Roger Goodell suspended four players for their roles in the program that paid defensive players cash bonuses to injure opponents.
The NFL Players Association has sued the NFL on behalf of Smith and two other suspended players to have their bans overturned, arguing that Goodell cannot be impartial by handing down suspensions while also hearing the players' appeals.
The NFL says Goodell followed the process agreed to in the collective bargaining agreement.
"Ultimately, (Goodell) made the call and it's in the court system," Smith said. "We'll see what happens. If I've got to serve the four games, I'll serve the four games. When I come back, I'll be 100 percent ready to go and lead my team."
Former defensive coordinator Gregg Williams, who the NFL said was the architect of the scheme, was suspended indefinitely.
The Associated Press contributed to this report.