“Why did the guy name his dog 5 Miles?”/“So every day he can say, ‘I just walked 5 Miles.’”

Entry in progress—B.P.
 
“The doctor told me that I need to lose some weight, so I bought a dog, named him ‘Some Weight,’ and lost him” is a similar joke.
   
Twitter
Jamie Capria
@MrFornicator
I named my dog 5 Miles so I can tell people I walk 5 Miles every day.
8:55 PM - 2 Nov 2012
 
Twitter
So Cal Pet Sitting
@SoCalPetSitting
Joke of the day:  I named my dog Five Miles, so I can tell people everyday I walk Five Miles.
1:16 PM - 2 May 2013
 
Twitter
Du-par’s Restaurants
@DuParsRestauran
Joke of the Day:  I named my dog “Five Miles.”  That way, I can tell my friends everyday I walk five miles.
3:14 PM - 6 May 2013
 
Lite Rock 105 Music
Brian’s Corny Joke of the Day
Posted on September 11, 2014
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Why did the guy name his dog 5 miles? SO EVERYDAY HE CAN SAY “I JUST WALKED 5 MILES”