The Pirates may be a possible trading partner this offseason. They have Marte, Cutch, and Polanco now. Willy Garcia should be ready next year. Meadows and Ramirez should be ready in 2017. They also have Josh Bell who they've moved to 1B, but probably has more value as an OF who should be ready next year.
Their rotation next year should be Cole, Liriano, Locke, Morton, and Glasnow and everyone is signed for the next two years, but they don't have much depth in case of injury as their prospects are bat heavy right now.