Best font for a last name baseball jersey?

It’s kind of what you prefer, right? Each MLB team has their own font. My advice would be to look at your favorite team and see if you can duplicate it. This is probably going to be something you’re going to need to do yourself, sorry!

That said there are plenty of websites for you to peruse. This was top on my search list
https://www.fontspace.com/category/baseball

The Red Sox have a unique and appealing font: https://www.dafontfree.co/red-sox-font/

Personally, I’m a bigger fan of cursive jerseys, which are classic: https://th.bing.com/th/id/OIP.Rk9Yy_2DPEDR-zejir7M-QHaHa?pid=ImgDet&rs=1 https://th.bing.com/th/id/OIP.2hREiFMCO6skgfyeXfV-kAHaHa?pid=ImgDet&rs=1 https://static.nike.com/a/images/t_PDP_1280_v1/f_auto,q_auto:eco/c0012c29-a3f3-45dd-a296-b3517cb477fa/texas-rangers-mens-replica-baseball-jersey-CxPbbM.jpg

I agree with @Love_my_doggie. I prefer the cursive fonts.
And then there is this.
https://www.insider.com/world-baseball-classic-great-britain-jersey-uniform-mocked-2023-3

While I prefer cursive fonts, they’re often more difficult to read, especially from a distance. Many times when watching a baseball game, for example, if I don’t know who’s playing, I can’t read their jerseys to find out because they’re in cursive. Personally, I’d advise against it.