Roberts and Leigh Halfpenny are both in the running to pull on the Blues jersey this weekend against Munster - a fact that will also please Wales coach Rob Howley ahead of the Six Nations.
The duo both picked up injuries, Roberts (elbow) and Halfpenny (neck), during the final game of a forgettable autumn for Wales, the last-gasp defeat against Australia on December 1.
At the time it was expected the pair would face a race to prove their fitness in time for the Six Nations opener on February 2 however they are in contention for Saturday's trip to Cork and Roberts told Wales Online: "It is good to be back after tearing my ligaments in the Australia game but luckily I did not have to have an operation.
"It is just good to be back playing because being out for four or five weeks is frustrating.
"Especially when there is a lot of rugby going on with the Welsh derbies and the Heineken Cup.
"I am fortunate to be back a week early and that is testament to the work of the physios here.
"You get given guidelines and I was looking at six weeks.
"I have trained hard and it has been difficult watching the team play without you.
"I am raring to go again in what is a really big season.
"I can't wait and get back on the field and play again and hopefully stay injury free."
Blues backs coach Gareth Baber added: "We haven't seen Jamie or Leigh around for a while but they have both pushed themselves back into contention.
"They are going through some tests this week just to make sure they are given the all-clear.
"But we expect to see them both involved this weekend."
63x46.png){kind=logo}