It was from this time that Foster started to get regular starts in all the teams he played till now. At Birmingham City, he instantly established himself in the main-eleven for the 2010-11 season. The next season, West Bromwich Albion successfully managed to seal a loan deal with Birmingham City for Foster before finalising the transfer in 2012. He spent a total of seasons at West Brom before leaving the club for Watford in 2018. Since joining Watford, he has been praised several times by analysts for his calm presence in the goal behind a considerably weak Watford defense and has won back-to-back Premier league goalkeeper of the year awards at the "London Football Awards".