[8][9][10][11] On 28 November, Selangor announced that six players, Joseph Kalang Tie, Norazlan Razali, Shahrul Igwan, Razman Roslan, Fairuz Abdul Aziz and Halim Zainal will be leaving the club after their contract would not be renewed for the upcoming season.
[14][15] The next day, Azizul Baharuddin, K. Sarkunan, D. Kugan and Faizzudin Abidin still remains and their contracts also been renewed too by the club.
Besides that, Saiful Ridzuwan switched sides and joined Melaka United on a free transfer after his contract with the club has become expired.
[23] Two days later, the club confirmed an agreement with Terengganu too for the transfer of midfielder Latiff Suhaimi on a free deal.
[24] Selangor also confirmed the signing of Azreen Zulkafali from FELDA United; he was along with new coach B. Sathianathan and K. Prabakaran, migrate to find a new challenge with the new club.
[27][28][29][30] Selangor have released their four foreign players last season, Ilham Armaiyn, Evan Dimas, Willian Pacheco and Alfonso Cruz, after their contracts were not renewed by the club.
[31][32] On 16 December, Selangor confirmed that Rufino Segovia still remains with the team, and it was announced that Spanish striker agreed to a contract extension with the club for a further a one-year until 2019, with an option of an additional year.
Finally, Selangor get the first victory after won by 3–2, with a goal scored by Sean Selvaraj, Wan Zack Haikal and Amri Yahyah.
After returning to Shah Alam, Selangor played their another friendly of the summer at UM Arena Stadium against Singapore club, Home United on 22 January 2019.
The match finished with a 1–1 draw, following a goals from Antonio German (Selangor) and Hadin Azman (FELDA United).
On 1 March 2019, Selangor suffered their second consecutive loss without a win after five matches in the league, as they were out-played by Johor Darul Ta'zim in a 2–4 home defeat.
After international break, Selangor continued their league match on 29 March 2019 with a narrow 1–0 victory against Terengganu at home, with a lone goal from Faiz Nasir.
[72] On the new month, the home game against Melaka United in the league ended in a 1–1 draw, with the goal coming from Syahmi was not enough to secure a win.
[73] On 15 May, a hatrick from new import Ifedayo Olusegun helped Selangor to take a smashing 3–1 victory over Kedah at home, and overtook visitor's position on the third place in the league.
[77] Four days later, Selangor lost to the top league current leader Johor Darul Ta'zim by 3–2, with Khyril Muhymeen and Sandro scoring the goals in an attempted late comeback.
[78] On 25 June, Pahang was defeated 5–2, with another great performance of Ifedayo as he managed his 2nd hat-trick in the league and another goals scored by Khyril and Endrick to complete another victory for the red giants side.
[81] Three days later, Selangor sealed another victory in the league game after defeated Petaling Jaya City 3–0 at home.
The match begins on 3 August in the group stage, where the red giants drew 2–2 with FELDA United at home.
A own goal from the home side by Jang Suk-won enough gave the red giants collect the first three points on the campaign.
[86] After international break, Selangor struggle to find victory after getting a 1–1 draw on 14 September against FELDA United at home.
Goals from Ifedayo and Khyril that ensure the red giants reach the top spot in Malaysia Cup Group D. At knockout stage, Selangor faced the title holders Perak in the quarter-finals.
A brace from Khyril and a goal from Syazwan Zainon gave Selangor a 3–2 advantage over the two legs, and secure the red giants a spot in the semi-finals.
[89][90] On 19 October, Selangor loss with a 1–2 defeat away at the hands of Johor Darul Ta'zim in the first leg of the Malaysia Cup semi-finals, despite an equalizer by Ifedayo.