First glance down the "All Recruits" listing and here's what references popped out to me:
Mashup of some current team USA volleyball players (first & last names swapped), Groundhog Day, Tommy Boy, Babylon 5, Magnum P.I., Douglas Adams' Hitchhiker's Guide series, Star Wars: Rebels, Firefly, Ghostbusters, Clerks, Pulp Fiction.  I'm certain I'm overlooking others given all the ones that I noticed on the first run.  Awaiting to see what others pick up on!

I only got a few and missed Firedly until I looked again. Pretty sure there's an A-Team in there.

Bit of Hitchhiker's and perhaps some Red Dwarf?

Yes, that's all well-spotted Kevin, Steve, and Roger.

You can thank Roy for most of those names (or send him mean comments if you don't like them).  😎

Also: Office Space and Breaking Bad (Lumbergh and Tuco).  Oh and Bill and Ted with Ted Logan of San Dimas...

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Also, I've gone soft and actually put in a John Holden name from John's Crazy Random Name Generator API this season:

Trusty Dramabadger

That's only because Mrs. Sellers likes anything with the word "badger" in it...

Was Roy also responsible for Marco Gabbiadini?

Nope, he's a real ex-football player.

I meant for choosing the name Steve, I remember him well.

I also see John Sheridan from the same era of English football.

Galaxy Quest spotted , Guy Fleegman

Phil Connors, Groundhog Day.

Phil Connors, Groundhog Day.

Phil Connors, Groundhog Day.

I seem to be repeating myself!

Marco was one of my requests yes, best player I've seen play in a Darlo shirt

John Sheridan is named not after the footballer but the Captain of Babylon 5 as Kevin spotted

Obviously you mean when he played for Pools Roy

@Roy, is Darlo (Darlington) that club with a very big and now unused stadium?

Oh yes it is Pierre - sadly (and yes, despite Darlo being the number one rival, it is very sad) it meant the beginning of the end of the club

Darlington was that club with a very big and now is that club again...