He's 35, so of course he is going to be on the tail end of his career and not in his prime, but so is Koji. If you want to take about the last 4 or 5 seasons, I don't know how you don't put Papelbon in the group of elite closers. There's Melancon, Kimbrel, Uehara, Casilla, Jansen, Britton, and Papelbon. There's really it that have put together consistently elite seasons as a closer in the last 4/5 years. Again, Papelbon is going to eventually start fading, but he's still in the small group of closers that has shown consistent greatness over many seasons and is in that elite group. Just because he's on the tail end doesn't mean he's not elite. It just means the end is inevitable where as Kimbrel, Britton, etc are still in their prime. Papelbon might not put up top 5 stats every year, but he pretty much guarantees a solid year at worst, which IMO is the definition of elite.