In the meantime, test your knowledge of the Blades' signings from the last decade - some well known, some less so - and see if you can figure out the face from the clue. Keep a note of your answers, they're revealed at the end.
1. I was Sheffield United's most expensive signing in the 2010/11 season.
a). Rob Kozluk. b). Neill Collins. c). Erik Tonne. d). Elian Parrino. (Photo credit: OLI SCARFF/AFP via Getty Images) Photo: OLI SCARFF
2. I joined on loan from Sunderland in 2011/12, and returned permanently in 2018.
a). Billy Clarke. b). Kevin McDonald. c). Chris Basham. d). John Egan. (Photo by Bryn Lennon/Getty Images) Photo: Bryn Lennon
3. I arrived on a free transfer in 2012/13, and started my career at Man Utd.
a). Shaun Miller. b). Jamie Murphy. c). Paul Gallagher. d). Danny Higginbotham. (Photo by Gonzalo Arroyo Moreno/Getty Images) Photo: Gonzalo Arroyo Moreno
4. In 2013/14, I was signed from Livingstone. I stayed for four seasons.
a). Stefan Scougall. b). Sean McGinty. c). Stephen McGinn. d). Jose Baxter. (Photo by Pete Norton/Getty Images) Photo: Pete Norton