Trending up. Which players came on late in the season?

EDIT: a lot of you are naming obvious studs, Ladd, Gibbs, Bucky etc. What about 2nd and 3rd string guys who stepped up late in the season and are trending upwards?

Every year there’s guys that had a productive final 5 or so games and they make great mid to late round picks the following year. Who are they from this season? Bonus points if they’re a rookie.