<Li> All sold out home games are aired in the primary market . Games that do not sell out at least 72 hours prior to kickoff are subject to local blackout in the primary and all secondary markets . (see below) </Li> <Li> As stated above, no other games are allowed to air in primary markets at the same time as a sold - out home game, as it encourages ticket - holders to attend the game instead of watching another game on television . However, exceptions are made for shared markets . Secondary markets are not subject to this rule, as it is less expected for fans from a market potentially 100 miles away to attend every game . </Li> <P> During the afternoon games, CBS and Fox may switch a market's game to a more competitive one mid-game, particularly when a game becomes one - sided . For this to occur, one team must be ahead by at least 18 points in the second half . </P> <P> Due to the "Heidi Game", a primary media market must show its local team's game in its entirety and secondary markets usually follow suit for away games . Also, secondary markets (for home games) or any others where one team's popularity stands out may request a constant feed of that game, and in that case will not be switched . </P>

Can i watch nfl games after they are broadcast