Right, I won't dissect your style because the actual script needs to be the focus.
Your problem with the opening is that it's too short - we need to either see how miserable the whole team is or skip straight to the dressing room, with the opening shot being something akin to:
AWAY DRESSING ROOM - DAY
Men built like killing machines chuckle, spirits high.
One player, still in his rugby shirt, a slight sweat on his brow, guzzles a Lucosade. A tank of a man strolls past in a towel, wet from the shower. The Lucosade-guzzler holds out a palm casually, the tank-man slaps it in victory.
HOME DRESSING ROOM - DAY
MIKE, a burly, red-faced Irishman in his early 50s, stomps back and forth, his voice growing louder with each step as he declares -
MIKE
Shite. Shite. Shite!
The team, a particularly unathletic-looking group of Irish lads, early 20s (or whatever), sweaty and muddy, sit on the three benches lining the wall facing him. One of the players with a JEDWARD MOP rolls his eyes as if used to the speech and bored by it.
Mike picks up a water bottle -
MIKE
Absolute feckin' shite!
Mike hurls the bottle down at the floor -
It bounces up, hits a Jedward Mop in the groin. He slinks to the tiles, cluthing his manhood.
Mike doesn't apologise, instead, uses the mishap to launch into his next tirade -
MIKE
Yeah, bollocks. That about sums you sorry mob up!
I'm not a comedy writer so I'll stop there, but it seems to me that a lot of aspiring writers think that writing line-upon-line of dialogue as the lead players go about their daily business is what comedy is all about.
It isn't. It's about getting a chuckle out of your audience.
Make your opening strong in the sense that it either represents your team and the challenges they're going to have to over-come, or by making your audience laugh. Both would be best.
Your scenes are too short to present any story value and not amusing enough to justify their existence. I'm being exceptionally harsh because you're telling us that your script's too long and I want you to know EXACTLY why: too much meandering.
Professionals don't mess about, they get straight to the point. They present a story and if it's a comedy, it's humorous (to some degree) from the get-go. No mistaking the genre.
Amateurs meander and professional readers (AKA "Gate Guardians" - the Cock Blockers of an agent's underwear) put their scripts down somewhere between the first and tenth page... and these aspiring writers are never any the wiser as to why so can never develop.
In your pages, you go from the game to the dressing room and then to the pub, to have a couple of lads talk about an ugly girl before revealing their stupidity in buying a can of deodorant, to then move on to the home of one of them, all within the first three pages... but get this, because here's the really important part: nothing happens.
If the average Gate Guardian puts a wannabe's script down within the first ten pages, why aren't your first three falling all over themselves to make a damn good impression?
I get that Kevin Smith can pull these kind of things off, but you really need to focus on your story first and your dialogue secondly, or you'll ultimately have a funny script - at best - in which nothing happens (or not for a very long time).
Again: apologies for being tough, but write with your story in mind and you'll captivate the attention of audiences; write scene A, scene B, scene C, etc., for not much reason other than to insert a couple of lines you yourself would admit to only be mildly amusing, and your script won't last to page 20.