Amẹ́ríkàn futbọ́ọ̀lù tàbí bọ́ọ̀lù-ẹlẹ́sẹ̀ Amẹ́ríkà, ni eré-ìdárayá tó gbajúmọ́ ní Orílẹ̀-èdè Amẹ́ríkà àti Kánádà, ó jẹ́ eré-ìdárayá ẹlẹ́gbẹ́mẹgbẹ́. Florio, Mike (July 27, 2012). "Football remains an Olympic long shot". Pro Football Talk. NBC Sports. Archived from the original on December 30, 2012. Retrieved January 14, 2013.  Unknown parameter |url-status= ignored (help) "Gridiron" Archived November 7, 2017, at the Wayback Machine., MacMillan Dictionary "gridiron football (sport)". Britannica Online Encyclopedia. britannica.com. Archived from the original on June 14, 2010. Retrieved July 13, 2010.  Unknown parameter |url-status= ignored (help) Àṣìṣe ìtọ́kasí: <ref> tags exist for a group named "nb", but no corresponding <references group="nb"/> tag was found