Glennon's stats from last year;
247/416, 59.4%, 2,608 Yds, 6.27 YPA, 19 TDs, 9 Ints, 40 sacks, 83.9 QBR
Thoughts;
He ranked 21 in QBR, ahead of guys like Tannehill, RG3, Flacco, Schaub and Eli.
He ranked 26 in completion %, ahead of guys like Flacco, Stafford, Eli and Keap.
His TD/Int ratio of 2.11 is pretty good.
His YPA is very low, ranking 37 in the NFL.
He was clearly the best rookie QB last year but it was a pretty awful group so let's look at some other guys from the previous season because that's considered a very strong group.
Luck;
339/627, 54.1%, 4,374 yds, 6.98YPA, 23 TDs, 18 Ints, sacks, 76.5 QBR
Tannehill;
282/484, 58.3%, 3,294 YDS, 6.81 YPA, 12 TDs, 13 Ints, 35 sacks, 76.1 QBR
Foles;
161/265, 60.8%, 1,699 YDS, 6.41 YPA, 6 TDs, 5 Ints, 20, sacks, 79.1 QBR
Wilson;
252/393, 64.1%, 3,118 YDs, 7.93 YPA, 26 TDs, 10 Ints, 33 sacks, 100.0 QBR
Griffin III;
258/393, 65.6%, 3,200 yds, 8.14 YPA, 20 TDs, 5 Ints, 30 sacks, 102.4 QBR
So, we clearly see that Griffin and Wilson are just on another level as far as rookie performance. Outside of them however, Glennon's season is pretty on par or better than the other guys. We don't seem to think any of them had terrible rookie seasons for some reason.
One thing that stands out pretty drastically is the amount of sacks Glennon took. 3 sacks per game is a ton of sacks to take. It leads credence to the fact that his oline was in shambles. It also leads credence that maybe he held the ball too long. It's probably a bit of both. Games I watched he seemed to do a nice job of throwing it away but I didn't watch all the games.