The NBA Trade Season is upon us, with trade rumors coming faster that Santa’s sleigh and credit card bills. This year, speculation revolves around a crop of players who usually aren’t up for bid: centers. Almost every big-name center in the league has been rumored on the trading block in the last month, some for legitimate reasons and others more speculatively. The Portland Trail Blazers have been linked with many of those centers in theory. They’re not likely to be closing any deals in practice, but that doesn’t stop people from dreaming. That’s the subject of today’s Blazer’s Edge Mailbag.