The draft pick acquired in New England's Jimmy Garoppolo trade is leaving with former defensive coordinator Matt Patricia to Detroit.
While Johnson's production is unquestioned, scouts have expressed concerns about his build for the position.
"He's skinny-legged and has had some injuries," one scout told BobMcGinnFootball.com. "When you look at his body you can see why. Just not built like a traditional NFL running back. He makes a lot miss but he takes a lot of shots."
Now that Patricia has a full-house backfield, it's fair to wonder if 2015 second-round pick Ameer Abdullah will be placed on the trade block. Yesterday's savior is today's afterthought.