Picking out stats that match the eye test and dismissing others isn't a good way to use stats. The stats that suggest that Byfield is worse when playing with Brown and Athanasiou are no more important than those that suggest that Brown and Athanasiou are worse when playing with Byfield. There's really no basis for believing that Byfield, a 19yo with 12 NHL games and 2 points, is elevating or being burdened by a couple of veterans with nearly 1,600 games and 900 points (26 just this season) more than him. I think that he's luckier to play with them than they are to play with him. He needs to develop more before he becomes too good for any possible linemates on this team, IMO.
Something to think about that we may be able to agree on is that the other side of that "night and day difference" was the player that was removed. Byfield, Brown and Grundstrom were clicking pretty well (see the stat line w/o Athanasiou) until Grundstrom was replaced with Athanasiou. Instead of blaming Athanasiou because the line has been bad since he joined it, maybe we should criticize McLellan for breaking up a line that was playing well. I would definitely join you in that. I don't like McLellan any more than you do.
Oh my.
There is
plenty of basis to suggest those guys are the problem.
look no further than Trevor Moore, who just had the Kings highest scoring month since Kopitar in 2018 the literal moment he was removed from the third line.
I don't even feel the need to justify any further, anyone watching the Kings wouldn't need the stats to confirm that AA is an absolute liability and Brown is simply a give-and-go pylon and that giving both of those guys to anyone would see a drop in #s and that has held true all year no matter who you staple Brown to. There's just no other way to say it, the eye test and the stats confirm. I cannot fathom anyone going to bat for these guys' NHL competency.
If you want a really fun exercise, you'll also realize that other rookies that have suffered the same fate--ie Turcotte--have posted pretty monster possession numbers until thrown some common anchors...
At this point we all just figure it's TM saying "no one else in the NHL can save this guy so if Byfield can he truly is a superstar." Will certainly agree that breaking up a functional line just to make AA a thing was absolutely stupid and the
third time this season Grundstrom has been benched for playing well.