Now he has returned to Stoke, the 20-year-old has had to readjust to his surroundings, including a new manager in Mark Hughes.
Butland told talkSPORT: "It is a bit weird. I was signed by Pulis, and now he's gone, but I was never really integrated into the set-up [having returned to Birmingham on loan], so this is a fresh start for everyone and puts everyone on the same page.
"But I've still got to impress the manager and put in the same effort. I was never expecting to walk in as number one.
"I'm still only 20, still learning the game. The target, of course, is to be number one, the same as it is for the other goalkeepers, so I'll go in and try to show the manager what I can do and we'll take it from there."
Butland made 46 appearances for Birmingham last season in their Championship campaign.