 Ramba uchiverenga ndima iyi - Keller aiva nhengo yeTeam USA iyo yakawana menduru yegoridhe pa2015 IIHF World U18 Championships. Pa2016 IIHF World U18 Championships, Team USA yakahwina menduru yebronze uye Keller ndiye aive mutungamiri weTeam USA. Keller akapiwa mubairo weMVP womutambo wacho. Pa2017 World Junior Ice Hockey Championships, Chikwata cheUSA chakahwina menduru yegoridhe uye Keller akatungamira Chikwata cheUSA mukuwana zvibodzwa uye akatumidzwa zita kumutambo weAll-star timu. 