“Eagles don’t deliver on Sunday” (NFL football joke)

The U.S. Postal Service doesn’t deliver on Sundays. NFL football games are usually played on Sundays. A popular joke asks, how is an NFL team like the postal service (or an NFL player like the mailman)? They both don’t deliver on Sundays!
 
The joke has most frequently been told about the Philadelphia Eagles (a New York Giants and Dallas Cowboys division rival), with the Philadelphia Eagles logo and the USPS eagle logo both shown. “I told y’all Eagles don’t deliver on Sundays…y’all must’ve thought I was joking” was cited on Twitter on December 23, 2012 and went viral by August 2013. The joke soon was told about other NFL teams.
   
“The 2009 Giants should be sponsored by the US Postal Service because like postal workers, they don’t deliver on Sunday” was cited on Twitter on January 3, 2010—before the Eagles’ version.
 
     
Twitter
Jordy McKever
‏@itsjordylive
RT @FauxJohnMadden The 2009 Giants should be sponsored by the US Postal Service because like postal workers, they don’t deliver on Sunday.
1:09 PM - 3 Jan 2010
 
Twitter
Jay Douglas
‏@King84Jay
I told y’all Eagles don’t deliver on Sundays…y’all must’ve thought I was joking http://instagr.am/p/Tl5T9yMzMK/
2:17 PM - 23 Dec 2012
 
Twitter
j_p24
‏@joannatx_
The eagles don’t deliver on Sundays.
Dallas, TX
2:54 PM - 30 Jul 2013
 
WeKnowMemes
Eagles Don’t Deliver On Sundays
– AUGUST 15, 2013
 
Twitter
A
‏@abraham_1795
The eagles don’t deliver on Sunday
3:32 PM - 19 Oct 2013
 
Twitter
John Tipton
‏@JTiptop
Just the post office, Eagles don’t deliver on Sunday. Let’s go @GopherHockey! #BeatBC
12:58 PM - 27 Oct 2013
 
Twitter
Fred McFarlin
‏@FredMcFarlin
I heard the US Post Office is considering a merge with the @Atlanta_Falcons…because they don’t deliver on Sunday, either!
2:40 PM - 11 Nov 2013
 
Twitter
Garrett oakey
‏@gwoaks
what do the bears and the post man have in common? they both don’t deliver on Sunday.
9:03 PM - 7 Sep 2014
 
Twitter
jasmine
‏@jassssyjay_
What do the raiders and mail man have in common ?
They don’t deliver on Sunday’s ! 😫😂😂😂 im dying lol
8:47 PM - 17 Oct 2014
 
Twitter
IG: @72MadisonGroup
‏@72MadisonGroup
Damn #eagles really don’t deliver on Sunday. See yall next year #CowboyNation #WeDemBoys #dc4l #Cowboys http://instagram.com/p/w444tbBRca/
6:28 PM - 21 Dec 2014
 
Twitter
Eric K
‏@EKar129
Q: What’s the similarity??
A: They both don’t deliver on Sunday!
(Birds from USPS, Seattle Seahawks are shown.—ed.)
9:04 PM - 1 Feb 2015