It’s that time of year where we bring you an overlook of every Mariners MiLB affiliate for the upcoming season. In previous years we’ve started at the lowest levels of the system and worked our way up, but this year we’ll be starting at the top, with the Tacoma Rainiers, and working our way down. The reason for this is twofold: first of all, MiLB Opening Day for Triple-A is Tuesday, April 5, as in tomorrow, so we want to have this preview in your hot little hands before Opening Day. All other leagues open this Friday, April 8, so all this week we’ll be gradually shedding A’s until we wind up in the DSL/AZL.