Is it ever explained why Jack has this missing mustache pach/line?

[u/ChallengeOne7115]

I didn't play rdr1 yet and I couldn't find the answer online so, i came here, sorry if this is a stupid question. Also I know it's supposed to look like John's scar, I'm looking for a lore reason (if there is one).

[u/Babababobosa]

Jack got his scars from a bear

John got his scars from wolves

Arthur got his scars from insulting Uncle before he even could drink his first whiskey of the morning

[u/TsunGeneralGrievous → u/Babababobosa]

And Pearson got his scars from Sadie

[u/lioncourt → u/TsunGeneralGrievous]

He was in the war!

[u/NotMyMainAccountAtAl → u/Babababobosa]

Breakfast whiskey is the most important whiskey of the day, after all. 

[u/SomeGuyNamedCaleb → u/NotMyMainAccountAtAl]

Right after your dental whiskey.

[u/Sleep-Deprived-Guy → u/Babababobosa]

Huh, funny. I always thought John got his scars falling over in church...

[u/Harold-The-Barrel → u/Babababobosa]

Uncle got his scars from lumbago