I believe it has been natural grass for a long time. Apparently they are doing something new this year (which I didn't know) called GOG (GameOnGrass) which is a sand based sod grown in plastic.
There have been many issues with it already.
He was asked about Tre and his comment was "We need to crawl before we can walk" so even though he's not on the injury report, it doesn't sound like they intend on him playing yet. JMO.
Thad looks like a piss poor ventriloquist whenever I see him on the pregame shows. It's like he's trying to talk but doesn't want to open his mouth when he is talking.