Muhannad Al-Saad

As a youth player, Al-Saad joined the youth academy of Saudi Arabian side Al-Ahli.

Al-Ettifaq

In 2017, after being released by Al-Ahli, Al-Saad joined Al-Ettifaq. He signed his first professional contract on 8 July 2023. In his debut season, he made three league appearances and scored zero goals and played under England international Steven Gerrard.

Neom

During the summer of 2024, he signed for Saudi Arabian side Neom, helping the club achieve promotion from the second tier to the top flight.

loan to Dunkerque

On 30 January 2025, he was sent on loan to French second-tier side Dunkerque until the end of the season. On 4 February 2025, he played his first game for Dunkerque in the round of 16 of the 2024–25 Coupe de France, to become the first Saudi to play in the Coupe de France and in a professional game in France. On 10 February 2025, as Dunkerque won 2-0 against Caen, he played his first Ligue 2 game to become the first Saudi to play in French second-tier division. On 21 February 2025, he scored his first goal for Dunkerque in a 3-0 win against Clermont Foot in Ligue 2, to become the first Saudi to score in Ligue 2 and in a professional game in France.. Arabic news website Goal wrote in 2025 that he "immediately become a key player for the team" while playing for the club. On 1 April 2025, he scored a goal in a 2-4 defeat against Paris Saint-Germain in Coupe de France semi-finals, to become the first Saudi to score in Coupe de France.

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In March 2025, Al-Saad received his first call-up to the Saudi Arabia national team for the 2026 FIFA World Cup qualification games against China and Japan. On 30 May 2025, he has made his international debut with Saudi Arabia against Jordan in an international friendly, in which he had also scored his first goal for the Green Falcons, ending the game as a 2–0 win for Saudi Arabia.

Al-Saad plays as a winger. Right-footed, he can play as a right-winger or as a left-winger.

International

As of match played 30 May 2025

Scores and results list Saudi Arabia goal tally first, score column indicates score after each Al-Saad goal