The Irish goalkeeper saved three spot kicks in the shootout to send the Reds through to the fourth round of the competition, following an uninspired goalless draw after 90 minutes. Kelleher saved penalties from Conor Hourihane, Craig Forsyth and Lewis Dobbin to allow Harvey Elliott to score the decisive spot kick.
The Republic of Ireland international was making just his 18th Liverpool appearance as he has clearly been designated as the Reds' cup goalkeeper. Jurgen Klopp named an incredibly inexperienced side, with no fewer than five youth team players in the starting lineup.
The German eventually brought on Darwin Nunez and Roberto Firmino to break down a stubborn Derby backline, which they were ultimately unable to do. Following his penalty heroics, Liverpool supporters took to Twitter to hail Kelleher's performance, especially for another heroic penalty shootout display:
Jamie Carragher admits he is surprised by Liverpool owner's desire to sell the club
Earlier in the week, the Fenway Sports Group revealed they were open to selling the Merseyside club after 12 years in charge.
Speaking to The Overlap podcast, Liverpool legend Jamie Carragher proclaimed (as per Sky Sports):
"I'd imagine there's something in it. How strong it is in terms of selling fully or trying to bring money into the club, I'm not sure. I think FSG have done a great job at the club, and I don't think they've ever proclaimed to have the funds of Manchester United, Chelsea or Manchester City.
"They were the owners who brought the title back, the owners who brought Jurgen Klopp, the stadium has been transformed, the training ground has been transformed. They've almost been a model for clubs like Arsenal."
"I am surprised. Will the club ever be valued as highly as it is right now again? With Klopp as the manager and the team having been so successful over the last few years? Maybe there's something in that.
"I just thought that with so many American owners coming into the league, I thought there was a power play in some ways where they could see something in the future given what we've seen in American sports, so I thought the owners would be here for a while."
"Maybe they woke up on Monday morning and read about how much Manchester City have made commercially and thought, 'You can't stop it, can you?!'"