The league office, though, referred to page 64 of the rule book, which states unsportsmanlike conduct is "Using entering substitutes, legally returning players, substitutes on sidelines, or withdrawn players to confuse opponents, including lingering by players leaving the field after being replaced by a substitute and an offensive player lining up or going in motion less than five yards from the sideline in front of his team's designated bench area. However, an offensive player is permitted to line up less than five yards from the sidelines on the same side as his team's player bench, provided he is not in front of the designated bench area."
The designated bench area is between the 32-yard-lines, and the Browns ran the play from their 38.