Wasn't he that C-grade player in your eyes just a few months ago? So players can improve at age 28, can't they?
No, I don't think players can improve much at that age.
You're looking at the whole thing from the wrong perspective. It's not that he has improved, it's that my assessment of his quality as a player was wrong based on his usage.
Marenis was undervalued, his usage changed, he's posting good numbers in a decent league, my impression of him changes accordingly, as long as he keeps up that pace.
The deeper you go and the closer you get to the semi-pro level, the more of these 'hidden' players you can unearth. I wouldn't even call it unusual. There's a large amount of North American players who call it quits after a try out in the AHL doesn't quite pan out - if they persisted and went on to play overseas, it's likely many of them could carve out good pro careers, with some of them even returning to NHL/AHL.
It has nothing to do with improving.
Jelisejevs case is extremely unusual, though, and I honestly can't wait to see him perform in the Olympics. I've never seen a player pop up out of nowhere and start posting such numbers at a major pro level.
We'll see if it's just a flash in the pan over the next year.