At 58 grams he can definitely take hoppers I would keep him on a every 5 days schedule for a little while longer (until he reaches 80 grams) than at that time weaned/small mice once a week will do just fine.
You may see him burrow every now and the but I can tell you that the only time my adults do is when I cool them down for breeding, during the rest of the year they just don't.