Rookie wide receivers traditionally didn't put up big numbers because it's a hard position to learn in the NFL. Remember when the likes of Anquan Boldin and Marques Colston and Michael Clayton having huge seasons were huge surprises? Those days have slipped away a bit, with guys like Beckham and Thomas putting up huge rookie years, but this year is pretty illustrative. The biggest numbers from a rookie receiver are likely to be from Terry McLaurin, and he's going to end with about 60 catches while playing nearly every snap (albeit on a putrid passing team). AJ Brown, Deebo Samuel, and Marquise Brown have been erratic game-to-game, with a couple big ones but mostly just quiet 2 or 3 catch games. Samuel hadn't really done anything of note until week 9 and has had a few good games since. DJ Chark had 14 unremarkable and scoreless receptions last season. He's on pace for 75 this year and might end up leading the league in touchdown receptions. Keep the faith for a bit.