Less than three weeks ago, Hoops boss Ian Holloway reckoned the £8 million signing from Cardiff in 2014 was six weeks away from any football after aggravating a hip injury.
It will be interesting to see if the 25-year-old makes a debut for the Russian club sooner than that.
Caulker was a hero at Cardiff before their Premier League relegation the summer before his move to west London.
But his QPR sojourn all things considered has frankly been a flop for the big fee.
He never got up a head of steam as far as form goes, and ended up in his first campaign with Rs getting relegated for the second season in a row.
Along with loans to Southampton and Liverpool that produced only seven appearances between them, Caulker has made as many headlines off the pitch as on it.
The club had to vigorously deny he was involved in a dust-up at a 2014 Christmas party but admitted he suffered a head wound. In May last year, there was a reported altercation at the O2 Arena during a concert.
Then in October, he was fined £1,000 for a public order offence at a night club in Esher, close to where he lives in Woking.
There was a wrongful arrest in Tesco's Weybridge over an alleged cheese theft, that proved more embarrassing to the store than Caulker.
Before he joined Rangers, he also picked up a fixed penalty notice in 2011 when at Swansea.
Ollie earlier said: “We've sent him to a different specialist. The last one wanted to cut him open and release a tendon in his hip.
“He couldn't find what it was so the last resort was that We took him away from him and put him to someone else and they've got a six week plan.
“I've never seen anyone look so down.
Holloway added: “It's not going to if you can't get fit and you've been injured. Some people can be unlucky and some people can't fulfil their potential.
“Everything is going wrong for him. We've got to support him and I'm sure we can help his career as he's a fantastic footballer."
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