Teams Sammu Ashan played for

Main FCSinhalese Sports Club (2016/17-2022/23)
 Tamil Union Cricket and Athletic Club (2023-2023/24)
Main ListASinhalese Sports Club (2017/18-2022)
 Tamil Union Cricket and Athletic Club (2023/24)
 Ace Capital Cricket Club (2024)
Main Twenty20Sinhalese Sports Club (2017/18-2022)
 Jaffna Kings (2021/22)
 Galle Gladiators (2022/23)
 Tamil Union Cricket and Athletic Club (2023)
 Ace Capital Cricket Club (2024)
Other FCSri Lanka A (2018-2021/22)
 Colombo District (2021/22)
Other ListASri Lanka A (2016/17-2018)
 Kandy District (2016/17)
 Galle District (2016/17-2018/19)
 Sri Lanka Emerging Players (2018/19)
 Sri Lanka Under-23s (2019/20)
 Colombo District (2021/22)
Other Twenty20Colombo District (2018)
 Sri Lanka Greens (2021)
Under-19 TestSri Lanka Under-19s (2014/15-2016)
Under-19 ODISri Lanka Under-19s (2014/15-2016/17)
Under-19 World CupSri Lanka Under-19s (2015/16)
Lanka Premier LeagueJaffna Kings (2021/22)
 Galle Gladiators (2022/23)
Sri Lanka Club ChampionshipSinhalese Sports Club (2016/17-2022/23)
 Tamil Union Cricket and Athletic Club (2023-2023/24)
MiscellaneousAnanda College, Colombo (2012/13-2015/16)
 Sri Lanka Under-19s (2014/15-2016)
 Sri Lanka Under-19s Emerging XI (2015/16)
 Western Province North Under-19s (2016)
 Sri Lanka Emerging Players (2018-2019)
 Sinhalese Sports Club Emerging Players (2018/19)
 Sri Lanka Under-23s (2019/20)
 Sinhalese Sports Club Under-23s (2021/22)