from MOST-IMPROVED DEFENSIVE PLAYERS BY POSITION LAST SEASON
https://www.profootballfocus.com/pro-most-improved-defensive-players-by-position-last-season/
This list solely reflects the players with the greatest increase in PFF grade from 2015 to 2016, meaning most players here had to have poor/replacement-level 2015 seasons to make the cut.
This list only considers players who played enough snaps to qualify for a rank at their respective positions in both seasons. In A.J. Bouye’s case, he played limited snaps in 2015, so for the purpose of this list, he wasn’t considered eligible. I only included players who had a significant enough body of work in both 2015 and 2016.
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1. Maurice Alexander, Los Angeles Rams
2015 season grade: 44.6
2016 season grade: 83.4
(Harry How/Getty Images)
Alexander played nothing but special teams as a rookie in 2014. The next season, he got his shot on defense in Week 7 and ended up playing in every game to finish out the year. The Rams moved him all over the place; he spent 43 percent of his snaps as a free safety, and he struggled. Jump to 2016 and Alexander found his rhythm as the team’s starting FS, playing over 75 percent of his snaps there. He displayed great coverage skills, as he was targeted once of every 32.4 coverage snaps (the fourth-best rate of 92 qualified safeties).