Agree with others. Looks young.
That said, have to ask what people mean when they say "cull buck".
Remove him from the herd? Not sure what that accomplishes unless he's a mature bully buck keeping other bucks away.
Remove his genetics from the herd? Unless you can kill his maternal lineage too (and siblings) then that's not possible.
Just as likely to be an injury as anything else.
In TN, every buck we kill is a herd ratio skew, and I can't think of a single good reason to kill him based on these pics unless he's just a deer you want to put in the freezer.