Merrill began his senior career with the Coquitlam Adanacs of the Western Lacrosse Association, and later the Brampton Excelsiors of Major Series Lacrosse, winning two consecutive Mann Cup championships (2008–2009).
Merrill started his senior career with the Coquitlam Adanacs of the Western Lacrosse Association, and later the Brampton Excelsiors of Major Series Lacrosse, winning two consecutive Mann Cup championships (2008–2009).