When the Buccaneers open their 2014 regular season Sept. 7, few fans will remember the particulars of tonight’s exhibition matchup against the Dolphins. But that hardly means the game doesn’t count. One of the primary building blocks in forming a competitive NFL team is establishing dominance at home, but the Bucs have been pushovers at Raymond James Stadium since Jon Gruden was dismissed as head coach after the 2008 season. In the past five years, Tampa Bay has dropped 26 of 40 games at home while failing to post a winning record at RJS during any season in that stretch. That’s a sharp contrast to the 14-year span from 1995-2008, when Tampa Bay went 73-39 on its own turf, suffering only two losing seasons at home. After a 16-10 setback at Jacksonville in the preseason opener, the Bucs realize they have to give their supporters tangible reason to believe. “First outing at home — new regime, new uniforms, new logo, new everything,’’ said two-time Pro Bowl defensive tackle Gerald McCoy. “All we have of what people think about the Bucs is from Game One (last week), so we know we have to come out better. “We have to start a lot faster and give the hometown fans something to hope for. All people want is hope. You don’t have to win the Super Bowl on Saturday. People just want hope, and we want to be able to give them that.”