His father Ayub Ahmed and his uncle Mohammad Javed both played cricket at the club level, Saim was initiated into the game at a young age with tape ball cricket from Gulistan-e-Johar, helped by his father as well by two elder brothers.
[5] Saim Ayub continues to make his mark in the PSL 2023 season with consistent run scoring for Peshawar Zalmi along with Babar Azam.
In December 2022, alongside fast bowler Ihsanullah and batsman Haseebullah Khan, Saim Ayub was one of the three youngsters selected to be included in the national squad for the second Test match of the New Zealand series in Karachi, so they could get some international exposure and see the dynamics of the dressing room.
[20][21] On November 26, 2024, during the second ODI match against Zimbabwe, Saim Ayub achieved a remarkable milestone by scoring a blistering century off just 53 balls.
This feat marked the second-fastest ODI hundred by a Pakistani cricketer, surpassed only by Shahid Afridi.
Saim's innings powered Pakistan to a dominant 10-wicket victory as they chased down the target of 146 with ease, finishing the match with 32 overs to spare.
[22] On November 28, 2024, in the final ODI, Saim made 31 off 37, making 4 boundaries, before being caught at deep square leg.
[24] In the second T20I, he made an unbeaten 36 runs off 18 balls, making 7 boundaries, and leading Pakistan to a blistering chase in just 5.3 overs.
[27] On December 13, 2024, in the second T20I, Saim Ayub scored his maiden T20I half-century against South Africa, carrying his bat with an unbeaten 98 off 57 balls.
[31] On 22 December 2024, in the third ODI match of the series against South Africa, he made his career's third century by scoring 101 runs off 94 balls.