I’d call that a power reverse curl
like you said, he needs a flatter back for the first pull
His second pull is the real problem…
He isnt explosive enough, the main benefits of cleans for football is to build this aspect.
He basically swings his back and catches his balance in a split stance for momentum. He needs to concentrate on getting vertical extension off the floor, and I would recommend keeping his feet together.
His elbows do not get nearly as high as they should which makes this a reverse curl.
So how do we fix this?
Form work for his DLs to keep a straight back- RDLs are a great accessory for this.
Power Shrugs- Shrugs with a little hip action REALLY work on pulling the bar with the traps
High Pulls- Get those elbows UP
Hang Cleans- Starting it put it all together
And remember the clean is a technical lift- numbers dont matter if you aren’t doing it right