Negative = cost runs. Positive = saved runs.. So according to the metrics, he's cost the team. That's obviously ********. Not a single defensive metric should be believed right now, just like most offensive metrics. It's mid April, nothing really means anything right now.
So over his career, per 150 games, DRS thinks he's saved 18.2 runs, or like a little less than 2 wins, and UZR thinks he's saved 4.7 runs, or around 0.5 wins. So it's probably around a win or so in reality.