Pro Football Focus recently published their list of secret superstars on all 32 NFL rosters, and it turns out that they like Maurice Alexander almost as much as Rams fans do.

The goal of PFF’s list was to shed some light on the achievements of less-known stars on each team “who have performed well but have yet to receiver the recognition their play deserves.” And while Mo might be a cherished member of his team’s secondary after his stellar showing in 2016, he’s yet to earn a reputation nationwide.

Related PFF rates Maurice Alexander most improved safety in 2016

Here’s what they had to say about the versatile, fourth-year safety:

2016 snaps: 920 Key stat: Improved his PFF grade from 44.6 to 83.4 from 2015 to 2016. Alexander saw 434 snaps in 2015 for the Rams, but this past season he started all year, replacing the departed Rodney McLeod. His coverage was the biggest leap in performance, and he notched two interceptions while allowing no scores when in primary coverage from his safety spot. Alexander only really had one poor game all season, a week 12 outing against the Saints in which he missed three tackles.

It was that major leap in PFF grade from 2015 to 2016 that made Alexander the site’s most improved player at his position last season, and a big part of the 26-year-old’s sudden success was his due to making the switch from strong safety to free safety.

Alexander recorded two interceptions, four passes defensed, one sack, a fumble recovery and 38 tackles in 14 starts in 2016, and all of the evidence indicates that he will only continue to get better and play an even more important role on the Rams defense.