I had a very similar surgery 11 years ago. My colon actually tore (diverticulitis related)and I had to have emergency surgery. Unfortunately, I had a colostomy bag for 3 months after the surgery and that was pretty tough to get used to. The surgeon removed about a foot of my colon and told me there was plenty of colon to spare. When all of the infection finally cleared up, he removed the bag and put me back together again.
Brock may not need the bag; but, he will face quite a bit of recovery and that will take some time. I think Dana is being generous in his prediction of Brock's return. Brock's system will need to return to normal and he will be pretty weak from the surgery. But, a full recovery is possible...I'm living proof and am by no means the athlete Brock is. Brock has a huge edge there.