Mosaddek Hossain, who comes from a family of cricketers, snuck up on Bangladesh cricket's consciousness during the 2013 Dhaka Premier Division Cricket League, helping Abahani Limited stay afloat in a disastrous campaign. He struck a century and three fifties, before having to head to the Bangladesh Under-19 training camp ahead of the 2014 World Cup in the UAE. The opportunity to get out of age-group cricket quite early proved to be an important milestone in his development.
His first-class debut in the 2013-14 season wasn't memorable: he got a pair against Khulna in Cox's Bazar. But in the following season, he struck 250 and 282, his first two hundred-plus scores in first-class cricket. He added another double-hundred in 2015. A Twenty20 International debut followed in January 2016, but it was a forgettable one against Zimbabwe. By then it was clear that he wouldn't be in coach Chandika Hathurusingha's 2016 World T20 plans.
Mosaddek however kept making the runs in domestic cricket, and in the 2016 Dhaka Premier League he was winning matches for eventual champions Abahani. At barely 20, Mosaddek was hailed by Abahani captain Tamim Iqbal as one with a "45-year-old brain".