Blues prop Gethin Jenkins is set to make his 100th appearance for the region tomorrow when his side take on the Scarlets.
Blues head coach David Young has made two changes to the team that defeated Newcastle Falcons for the match against the Scarlets on Saturday.
Second row forward, Paul Tito, returns to the starting line up with Bradley Davies dropping down to the bench. In the front row, Gareth Williams starts at hooker with Rhys Thomas also moving down to the bench.
Gethin Jenkins makes his 100th appearance for the Blues having joined the region in the summer of the 2004.
The Blues travel to Parc y Scarlets boosted by two big away wins, having recorded a 33-24 win over Ulster at Ravenhill in the Magners League and 55-20 win over Newcastle Falcons in the north east of England in the Amlin Cup. Even more impressively the Blues have also won their last five away encounters.
They will be buoyed by the fact they have beaten Scarlets twice already this season, 19-15 at Cardiff City Stadium in the Magners League and 38-23 at Parc y Scarlets in the Anglo-Welsh Cup.
Blues talisman Martyn Williams reckons Cardiff Blues face their toughest game of the year when they take on Scarlets.
With Heineken Cup qualification on the line for both sides, Wales flanker Williams is braced for a fierce Welsh derby.
Williams said: "This will be the toughest game of the year for us because we don't have a great record at Llanelli and because of what is at stake for the Scarlets.
"They know they will be out of the running for qualification if they lose and that will really drive them on."
The Blues have won just one of their last seven games at the west Wales region but travel on the back of reaching the semi-finals of the Amlin Challenge Cup with an emphatic 55-20 demolition of Newcastle Falcons.
Williams said: "We are going into the game on a high after a good performance against Newcastle. We played some good rugby, albeit against a pretty poor defence. But we will build on that confidence for a tough game."
Scarlets Head Coach Nigel Davies has opted for a few changes to the team that started in Toulon and this week told his players to "stand up and be counted" after a disappointing display in the South of France.
British Lions and Wales international hooker Matthew Rees does not make the fitness race due to a minor neck injury, with Ken Owens starting for the Scarlets in the big derby.
Daniel Evans starts at full-back ahead of Rhys Priestland who is on the bench - the only change in the backs from last weekend's team. Rhys Thomas starts at tighthead prop with Deacon Manu on the bench. Tavis Knoyle gets the scrum-half jersey and Josh Turnbull comes in at flanker with Rob McCusker on the bench.
Davies said: "We lacked urgency last weekend and will be putting that right for this game, Cardiff are playing some good rugby - they are scoring tries and showing the quality they have in their squad.
"We know we are going to have to defend well, they have some big ball carriers, who get them over the advantage line and give them good go forward ball, some very useful backs and key strike players that we'll have to manage."
Blues 15 Ben Blair 14 Leigh Halfpenny 13 Casey Laulala 12 Jamie Roberts 11 Chris Czekaj 10 Ceri Sweeney 9 Richie Rees 8 Xavier Rush 7 Martyn Williams 6 Maama Molitika 5 Paul Tito (c) 4 Deiniol Jones 3 Taufa'au Filise 2 Gareth Williams 1 Gethin Jenkins
Replacements: 16 T Rhys Thomas 17 John Yapp 18 Bradley Davies 19 Sam Warburton 20 Lloyd Williams 21 Dai Flanagan 22 Dafydd Hewitt
Scarlets 15 Daniel Evans, 14 Sean Lamont, 13 Regan King, 12 Jonathan Davies 11 Andy Fenby, 10 Stephen Jones, 9 Tavis Knoyle, 1 Phil John, 2 Ken Owens, 3 Rhys Thomas, 4 Lou Reed, 5 Dominic Day, 6 Josh Turnbull, 7 Richie Pugh, 8 David Lyons (capt).
Replacements: 16 Deacon Manu, 17 Emyr Phillips, 18 Damian Welch 19 Rob McCusker, 20 Martin Roberts, 21 Rhys Priestland, 22 Lee Williams.
Principality Stadium will host the UEFA Champions League Final in six weeks' time. WRU chairman Gareth Davies, Football Association of Wales chief executive Jonathan Ford and Ambassador Ian Rush joined young sports fans at the trophy arrival at the venue to celebrate the magnitude of the event on Saturday 3rd June (kick-off 19.45).
British and Irish Lions captain Sam Warburton is looking forward to bringing together players from Ireland, Scotland, England and Wales for the biggest challenge of their careers - a series against world champions, New Zealand.
For the fifth year running, Wales referee Nigel Owens will be in charge of proceedings at Judgement Day V at Principality Stadium. It promises to be 'extra special' for the Wales' favourite ref, as he will be making his 150th appearance in the league.
There will be no shortage of inside knowledge from Bowl Finalists Caerphilly and Amman United when they face each other on Sunday at National Finals Day. Caerphilly hooker Rhys Cleverly knows the Principality Stadium pitch better than most as a matchday groundsman, while Amman United can look to Wales' record try scorer Shane Williams for some helpful advice.
Two hundred and 40 teams competed in the inaugural Urdd WRU 7s held at Pencoed last week with Welsh internationals Steff Andrews and Jasmine Joyce impressed with the talent on display, as was Urdd chief executive, Sioned Hughes.
The countdown is on for Judgement Day V as tickets for the big day at Principality Stadium soar through the 50,000 mark. Players and coaches alike are bursting at the seams to play in the double header with Dragons coach Kingsley Jones claiming there is a 'real buzz' about the event.
WRU TV went behind the scenes when the four regions got together to test their skill set for the BBC's Scrum V Live rugby show, at the WRU National Centre of Excellene in the build up to Judgement Day V. Blues' Matthew Morgan was one of the stars of the show while the Dragons' Cory Hill proved a surprise package...the full set of results will be revealed on tv screens on matchday
Wales assistant coach Richie Pugh is confident his side can cause a few headaches in the Hong Kong Sevens this weekend. In a tough group, Wales kick off their campaign against New Zealand on Friday before playing Japan and Fiji, who are chasing their third consecutive Hong Kong title, on Saturday.
Bedwas had to overcome a stubborn Carmarthen Quins side before winning the Foster's Challenge Cup final in Bridgend with a 23-18 victory. Bedwas captain Nicky Griffiths pays tribute to his side who have claimed the club's first piece of silverware in the modern era.
Team coach Brett Davey is aiming to keep his unbeaten run in cup finals at Principality Stadium intact when his side take on Amman United in the WRU Bowl final, after he guided Caerphilly to a 20-14 win against Cilfynydd in the semi-finals.
Penallta are hoping to go one step further than last season when falling to Bedlinog in the WRU Plate Final. After a titanic struggle against Nant Conwy, they have given themselves a great chance, after a hard fought 18-13 semi-final victory.