Kubva mundima yakapihwa, bvisa kufambira mberi kwenhamba yemitambo mumwaka weNFL.
Context:Kubva muna 1920 kusvika muna 1934, NFL yakanga isina nhamba yakatarwa yemitambo yokuti zvikwata zvitambe, panzvimbo pezvo yakagadza zvishoma. Chikwata ichi chakarayira kuti timu imwe neimwe itambe mitambo gumi nembiri mwaka wose kutanga muna 1935, ndokuzoipfupisa kusvika pamitambo gumi nerimwe muna 1937 nemitambo gumi muna 1943, zvikurukuru pamusana peHondo Yenyika II. Pashure pokunge hondo yapera, nhamba yemitambo yakadzokera kumitambo gumi neimwe muna 1946, uye gare gare kudzokera kumitambo gumi nembiri muna 1947. Nhabvu yeNFL yakaenda kunhandare yemitambo gumi nemana muna 1961, iyo yaichengeta kusvika yashandurwa kuita 16-mutambo muna 1978. Muna Kurume 2021, iyo NFL yakatora zviri pamutemo chirongwa chemitambo gumi nemanomwe mushure mekuwana chibvumirano cheNational Football League Players Association (NFLPA).
Mumakore apakuvamba eNFL nhabvu yakangoita kuti mitambo 12 itambe mumwaka mumwe nomumwe kubva muna 1920 kusvika muna 1934. Muna 1937 zvikwata zvakatamba mitambo 11. Muna 1943 zvikwata zvakatamba mitambo gumi nekuda kweHondo Yenyika II. Pakazosvika 1947 zvikwata zvaitamba mitambo 12 mumwaka. Kubva muna 1961 kusvika muna 1978 zvikwata zvakatamba mitambo gumi nemana mumwaka usati watamba mitambo gumi nematanhatu mumwaka kusvika muna 2021. Nhasi, chikwata chimwe nechimwe cheNFL chinotamba mitambo 17 mumwaka.