Why Knicks' Mitchell Robinson is a building block, not a trade chipThe 20-year-old center can be an anchor for a future top-tier defense3/31/2019, 3:26 AMFeb 22, 2019; New York, NY, USA; Minnesota Timberwolves forward Anthony Tolliver (43) has his shot blocked by New York Knicks center Mitchell Robinson (26) during the first half at Madison Square Garden. Mandatory Credit: Andy Marlin-USA TODAY Sports / Andy Marlin