Pedzisa mutsara unotevera: Horn akapedza kudzidza paAthol Murray College yeNotre Dame muna 1985 uye akaunganidzwa naBill Wilkinson kuti atambe kuWestern Michigan. Akava mutambi wekutanga wechikwata semunhu wekutanga, achitora mushure mekupedza kudzidza kwaGlenn Healy, uye akadzorera timu kumwaka wavo wakanakisa munhoroondo. Horn akaisa chirongwa chekurekodha uye akatungamira nyika nekukunda makumi maviri neshanu, achibatsira WMU kuhwina mitambo makumi matatu nematanhatu gore iro (mwaka wega we30-kuhwina wechirongwa kubva muna 2021). Horn akatamba zvakanaka mumwaka wenguva dzose, achibatsira timu kupedzisa mune yechipiri nzvimbo tie muCCHA, asi yaive mumutambo wekutamba kwaakazova nyeredzi. Nepo WMU yakanga yatungamirirwa nekurwiswa kwavo kwakasimba, Horn akachengeta timu yake mumasemifinal vachipesana neBowling Green, vachikunda mutambo munguva yekuwedzera. Iye akabva akabata pamusoro-seeded Michigan State kune chinangwa chimwe chete kuti atore timu yekutanga musangano wemakwikwi (iyo Broncos yaisazokunda imwe kwemakore makumi maviri nematanhatu). Horn akatumidzwa zita rekuti Tournament MVP uye akatungamira timu yake kunzvimbo yavo yekutanga yeNCAA Tournament. Kunyange zvazvo chikwata chacho chakanga chabviswa mumakwikwi emakota ekupedzisira, Horn akawana mukurumbira wakaipa pamusana pokubudirira kwake uye akasarudzwa neHartford Whalers mumakwikwi akatevera
NHL Draft.