There’s a big learning curve for rookies in the NFL.

One moment, you’re making big plays against a bunch of guys who will be working desk jobs in a few months, the next, you’re facing off against some of the world’s best athletes.

There are currently 10 rookies on the Detroit Lions’ active roster, one on injured reserve (Austin Bryant), and five on the practice squad (Tom Kennedy, Travis Fulgham, Wes Hills, Isaac Nauta and Matt Nelson).

Of the 10 players who have proven that they have what it takes to play in the pros, four of those rookies — Beau Benzschawel, Michael Jackson, Amani Oruwariye, and David Blough — have barely seen the field, if at all, this season, so they will not be graded.

So how have the rest of these rookies graded out halfway through their first season? Let’s take a look.