Thirty-three-year-old Kallio will remain at Bramall Lane until 23 December, with Blades boss Blackwell saying: "He's a big, strong player and the reports we've had on him playing for Fulham reserves suggest that he's done quite well."
- Championship fixtures
- Championship table
Of Ikeme, Blackwell added: "With Ian Bennett out for an indeterminate amount of time we had no other goalkeeper at the club apart from Mark Bunn.
"With seven games between now and the new year I couldn't afford to go into that period without another one in."