"Great to be back on my feet - a bit of a unique and magical procedure has happened to get me here tonight!" he said of his recovery process.
The TV star suffered an annular fissure, which is a tear in the lower disk of the back.
Grant's wife Chezzi took to Instagram to praise her husband.
"He’s still a bit stiff, and has to lie down flat when he can... but we are miles ahead of where we were a week ago!" she wrote, adding that she was still going to have a hard time convincing Grant to slow down.
Welcome back, Grant!