There are also new opportunities for a number of younger Scarlets to test themselves including Wales U20 centre star Steffan Hughes while there is a welcome return for Rob Evans after missing out last weekend with concussion and he will front up in the front row alongside Darran Harris and Carmarthen Quins tight head Ian Jones.
The Scarlets have also brought in a young prop talent on loan from Bath, Adam Jamieson who will be on the bench following the Wales call-ups of Samson Lee and Rhodri Jones and with Deacon Manu out long-term with a fractured arm, Jacobie Adriaanse recovering from injury (shoulder) and Horatiu Pungea on international duty with Romania.
Head Coach Simon Easterby said: "Last weekend was a good start and a group of new Scarlets played some good stuff. Obviously we're really affected by international call-ups and we have to be mindful of the vital league games in front of us, so we are handing lots of opportunities to players in the region for what will be a big game up at Saracens."
The Scarlets this week trained at the Cardiff Blue's Arms Park on their new 4G surface in preparation for the artificial pitch at Allianz Park.
Easterby said: "It was good It was great to have the opportunity to train on a similar 4G pitch and we are grateful to everyone at the Cardiff Blues for opening up the pitch for us - hopefully it will help us prepare for Sunday's game well.
"It does play differently and it was important for our squad to get used to that; it's said it creates a quicker game and supports an expansive game with more ball-in-play time which suits us.
"It will be a big test against Saracens for many of these players - a real challenge for them but that is what's important is that our wider squad are give the chance to push through and that our young players are exposed to a higher level of rugby and game time at this level.
"Saracens have shown they are pretty strong this year; they are able to rest players as well as lose players on international duty and still put out a strong side, you only have to see the team that was on the field against Wasps. So it's a pretty big challenge for us.
"We've seen many young players develop and benefit from these types of games and they can kick on from this platform and make an impact. It's a great opportunity for them this weekend.
"We also have to manage our squad during what will be a big next two months for us with Connacht, Leinster, the Clermont Heineken Cup double header, Munster and Ospreys back to back fixtures at Christmas and New Year."