So update- I took him out on a nearby trail and he definitely won't be jogging with me, haha he just doesn't have the running stamina. He can definitely walk for miles though. I think with his shape it's just too difficult to keep from tripping over himself when he runs. I think he'll be a great hiking buddy.
I am also concerned about the back problems, so if he wants to run we can go to the dog park so he can pace himself.