In the early seasons of regional rugby, the Scarlets played a small number of games at the Racecourse Ground in Wrexham.

[10] Largely drawn from the Llanelli RFC side that won the Welsh Cup the preceding year, the Scarlets carried that success forward into their inaugural season.

Plagued by injuries and retirements, as well as the departure of influential fly-half Stephen Jones to Clermont, the Scarlets finished a disappointing fifth in the league.

After finishing at the top of their pool, they defeated Bath by one point in the semi-finals to reach the final against London Wasps at Twickenham; missing several international players, they lost 26–10.

In the Heineken Cup, it was a similar story to the previous season, with the Scarlets winning two of their six fixtures to finish third in the pool again, behind Toulouse and Wasps.

The Scarlets' Director of Rugby, Gareth Jenkins, had been appointed as Wales' national team coach, having been with the region since its inception.

There was opposition by local residents to plans by the Scarlets to move to a new stadium and sell their current ground for housing development.

The information sheet stated that, due to delays caused by the opposition and benefactors pulling out of the club, it was "extremely unlikely that [the Llanelli Scarlets] could survive to the end of the present season unless other financial assistance is found", which would result in "the loss, probably for all time, of professional rugby in West Wales."

They beat current holders Munster 24–15 at Stradey Park in the quarter-finals, but were beaten 33–17 in the semis by a strong Leicester Tigers side, putting an end to their hopes of making it 'third time lucky' in Heineken Cup semi-finals.

[17] Nigel Davies departed the club at the conclusion of the 2011–12 season, and was replaced by defence coach and longtime Scarlets player, Simon Easterby.

[18] In May 2014, it was confirmed that the four Welsh regions would compete in the annual Premiership Sevens Series after a three-year deal was agreed with BT Sport.

Centre Jonathan Davies left for Clermont ahead of the 2014–15 season, but Hadleigh Parkes was signed from Auckland, and reunited with former coach Pivac.

The Irish forward arrived from Leinster, and capable of playing at lock and in the back row, proved to be an influential player in the pack.

[29] Salaries had increased as they worked to entice Welsh players abroad to return, and they aimed to streamline costs with a banding system.

Shortly after the proposal was revealed, Scarlets ownership indicated the merger was "off the table", with Ospreys chairman Mike James resigning, and the club formation ultimately remaining unchanged.

The Scarlets and the New Zealand Rugby Union agreed to a release for Mooar, and his assistant coach Glenn Delaney was named as his successor.

[33] Former Scarlets Dwayne Peel was announced as head coach for the forthcoming season, with Delaney moving to a Director of Rugby role.

[40] Few signings were made prior to the 2022–23 United Rugby Championship season, with All Blacks utility forward Vaea Fifita the headline acquisition, while Liam Williams departed for Cardiff following his second spell with the club.

[44] They then beat Bayonne and the Cheetahs in the return matches to finish top of the pool and set up a round of 16 knockout fixture at home against Brive.

[52] The Scarlets won the match 32–30, with a late try by Ryan Conbeer and a match-winning conversion from Sam Costelow three minutes from full-time, propelling them into a home semi-final.

[55] Notable departures included Rhys Patchell, Leigh Halfpenny, and Aaron Shingler, who spent his entire professional career with the club.

[57] In the backroom, Nigel Ashley-Jones departed the club after two seasons to join Eddie Jones with the Australia national rugby union team.

[60] Joining the club were Welsh international Ioan Lloyd from Bristol Bears, and former Scarlet Tomi Lewis returning from Jersey Reds.

[61] Numerous renewals were also confirmed, such as lock pair Morgan Jones and Jac Price, centres Ioan Nicholas, Joe Roberts, and Eddie James, and prop Kemsley Mathias– all players developed from the Scarlets academy.

[65][66] Also signed was former New Zealand U20 back row Taine Plumtree, who qualified for Wales and was quickly called up to the Welsh squad for World Cup preparations.

[67][68] Added to the restructured Scarlets academy were lock Ed Scragg, and Loughborough duo Charlie Titcombe and Teddy Leatherbarrow.

[77] Johnny McNicholl was released early to return home to New Zealand, joining the Crusaders as cover for former Scarlet Leigh Halfpenny.

[78] Notably, former Scarlets and Wales captain Ken Owens retired prior to the end of the season, having spent his entire professional career with the club.

[86] Props Hookers Locks Back row Scrum-halves Fly-halves Centres Wings Fullbacks Props Hookers Locks Back row Scrum-halves Fly-halves Centres Wings Fullbacks The following players have represented their countries at the Rugby World Cup, while playing for the Scarlets: The following players were selected for the British & Irish Lions touring squads while contracted to the Scarlets: Stephen Jones was also selected for the 2005 Lions tour while playing for Clermont Auvergne, while George North was also selected for the 2017 tour while playing for Northampton Saints.

Former Scarlets Scott Quinnell, Robin McBryde and Dafydd James were also selected for the Lions on the 2001 tour to Australia while playing for Llanelli RFC.