Cass was with Newcastle United from 2012 to 2022. He spent the 2020–21 season on loan at Hartlepool United, who won promotion out of the National League via the play-offs. He spent the first half of the 2021–22 season on loan at Port Vale before joining the club permanently in July 2022. He was loaned to Stockport County for the second half of the 2023–24 season. He joined Grimsby Town in July 2024.
On 1 October 2020, Cass joined National League club Hartlepool United on loan for the 2020–21 season.[7] He made his first-team debut two days later as "Pools" recorded a 2–1 win over Aldershot Town.[8] He played primarily on the right-hand side of a three-man defence at Hartlepool.[5] He signed a new contract with Newcastle in January, keeping him tied to St James' Park until 2022.[9] On 9 March, he was sent off 24 minutes into a 1–1 draw at Altrincham.[10] He made a total of 37 appearances throughout the campaign, helping Hartlepool to qualify for the play-off quarter-finals in fourth-place.[3] Hartlepool went on to secure promotion out of the play-offs, though Cass was not in the matchday squad for the final as he was recovering from a hamstring injury.[11][4] Hartlepool manager Dave Challinor tried to bring back Cass to Victoria Park on loan for the following season but was unable to do so due to competition from other clubs.[12]
Port Vale
On 12 July 2021, Newcastle United loan manager Shola Ameobi sanctioned a season-long loan move to League Two side Port Vale.[13] He was signed by manager Darrell Clarke to compete with James Gibbons at right-back and to provide cover at centre-back.[14] He made his debut for the "Valiants" on 10 August, coming on as a 65th-minute substitute for Dan Jones in a 2–1 defeat to Newcastle's Tyne–Wear derby rivals Sunderland in an EFL Cup first round fixture at Vale Park.[15] He scored his first goal in professional football in a 5–1 victory over Accrington Stanley in an FA Cup first round match on 6 November.[16] He impressed in his 27 appearances for the "Valiants", playing on the right of the back three or at wing-back, and received interest from other lower league clubs in the January transfer window before his season was cut short after he tore his ankle ligaments in training on 27 January.[17][18] During his recovery time he provided scouting reports for Port Vale acting manager Andy Crosby in the North East.[19] Port Vale went on to win promotion out of the play-offs in May, and Cass said that "I hate watching this on TV, I would rather be a part of it".[20]
On 11 June 2022, Port Vale announced that Cass would join the club on a contract of undisclosed length from 1 July; David Flitcroft, the club's director of football, stated that "I spoke to Darrell [Clarke], Andy [Crosby] and Dean [Whitehead] and the way they all spoke about him you could see they admired him... it was a collective decision".[21] He started four of the opening five league games of the 2022–23 season, before dropping out of the team to accommodate Will Forrester.[22] He missed February and March after being sidelined with a calfstrain.[23][24]
On 4 November 2023, he put in a man of the match performance in a 0–0 draw at home to Burton Albion after centre-back partner Nathan Smith was sent off, and after the game commented that he felt his physicality had greatly improved over the previous 12 months as he adapted to League One football.[25] However, seven days later he made a mistake to give away the equalising goal in a 1–1 draw at Lincoln City, only to come off the bench to score his second career goal in the replay at Burton Albion four days on from the Lincoln game.[26]
On 1 February 2024, Cass signed for League Two club Stockport County until the end of the 2023–24 season, reuniting with his former boss at Hartlepool, Dave Challinor.[27] He scored his first ever league goal on his debut for the club nine days later, in a 3–1 win at Grimsby Town.[28] On 9 March, he won nine aerial duels and also made four clearances and two interceptions as Stockport beat Newport County 1–0; his performance earned himself a place in the EFL Team of the Week.[29] Stockport were promoted as champions and he returned to Port Vale, who had been relegated out of League One.[30] He returned to Port Vale, where he was released.[31]
Grimsby Town
On 9 July 2024, Cass signed a two-year contract with League Two club Grimsby Town.[32] Head coach David Artell said he "had a longstanding interest in Lewis" and had tried to sign him in the January transfer window.[33] He made his competitive debut for the club in a 1–0 away defeat to Fleetwood Town on the opening day of the season.[34] Cass scored his first goal for the club as a substitute in a 3–2 victory over Carlisle United on 28 September.[35]
Style of play
Cass is a defender who can play as a right-back or centre-back.[5]