The veteran manager had already drafted in Wes Thomas, 32, the former Arsenal and West Brom winger agreeing a short-term deal until the summer.
Yesterday, Warnock was reunited with 37-year-old goalkeeper Paddy Kenny and former Watford defender Lloyd Doyley, 33. The pair signed short-term deals after training with the Millers.
It is the fifth time Warnock and Kenny have worked together, having previously operated at Sheffield United, Leeds United, Bury and QPR.
Warnock believes their experience will be vital as Rotherham look to climb out of trouble.
They are five points adrift of safety before today’s tough trip to Turf Moor.
“Young Alex Cairns is a good goalkeeper, but I think that at this level you need a bit of experience at what is a critical time of the season,” said Warnock.
“Paddy will give us that in abundance. Andy Dibble has been really pleased with Paddy; he has looked sharp and brings great experience at this level.”
Doyley has spent his entire career to date with Watford, ending a 14-year stay in 2015.
“Lloyd is a player who knows the league well and he comes in to help us at a difficult time with a lot of games coming up,” added Warnock.
“If you ask anybody about Lloyd, they will tell you that he is a really good pro.
“He played over 500 games for Watford.
“You can put him anywhere across the back and he will give 100 per cent.”
Last six: Burnley WWLDWD Rotherham United WLDLLD.
Referee: T Robinson (Sussex).
Last time: Burnley 2 Rotherham United 1; March 12, 2005; Championship.