<Table> American football <Tr> <Td_colspan="2"> Larry Fitzgerald (in blue) catches a pass while Cortland Finnegan (in red) plays defense at the 2009 Pro Bowl . </Td> </Tr> <Tr> <Th> Highest governing body </Th> <Td> IFAF </Td> </Tr> <Tr> <Th> Nicknames </Th> <Td> <Ul> <Li> Football </Li> <Li> gridiron </Li> </Ul> </Td> </Tr> <Tr> <Th> First played </Th> <Td> November 6, 1869 New Brunswick, New Jersey, United States (Princeton vs. Rutgers) </Td> </Tr> <Tr> <Th_colspan="2"> Characteristics </Th> </Tr> <Tr> <Th> Contact </Th> <Td> Full - contact </Td> </Tr> <Tr> <Th> Team members </Th> <Td> 11 (both teams may freely substitute players between downs) </Td> </Tr> <Tr> <Th> Type </Th> <Td> <Ul> <Li> Team sport </Li> <Li> ball game </Li> </Ul> </Td> </Tr> <Tr> <Th> Equipment </Th> <Td> <Ul> <Li> Football (leather prolate spheroid) </Li> <Li> Football helmet </Li> <Li> Pads (shoulder and knee) </Li> </Ul> </Td> </Tr> <Tr> <Th> Venue </Th> <Td> Football field (rectangular: 120 yards long, 53 1 / 3 yards wide) </Td> </Tr> <Tr> <Th> Glossary </Th> <Td> Glossary of American football </Td> </Tr> <Tr> <Th_colspan="2"> Presence </Th> </Tr> <Tr> <Th> Country or region </Th> <Td> Worldwide (most prominent in North America, Europe, and Japan) </Td> </Tr> <Tr> <Th> Olympic </Th> <Td> No (demonstrated at the 1932 Summer Olympics) </Td> </Tr> <Tr> <Th> World Games </Th> <Td> Yes (invitational sport at 2005 and 2017 Games). </Td> </Tr> </Table> <Tr> <Td_colspan="2"> Larry Fitzgerald (in blue) catches a pass while Cortland Finnegan (in red) plays defense at the 2009 Pro Bowl . </Td> </Tr>

How many football players are in a team