[2] Al-Mosailem was the third player to join Al-Ahli from Hajer following the transfers of brothers Misfer and Taisir Al-Jassim a couple of months earlier.

Al-Mosailem eventually regained his starting spot and played a vital role in Al-Ahli's first league title in 32 years.

[10] Young Al Ahli goalkeeper Yasser Al-Mosailem was handed his chance in the national set-up with veterans Mabrouk Zaid and Mohammad Khouja being absent.

However, subsequent injuries forced him to be excluded from the national team in major competitions like 2011 and 2015 AFC Asian Cups, and losing the position to Waleed Abdullah.

Yasser has stated that he likes to spend most his time on social media such as Instagram and Snapchat.He is a member of Shia Muslim minority of Saudi Arabia.