Thanks to some random guy on the Internet, Redditor user 'to_be_quite_frank', we can see all of the Pro Football Focus rankings for the Ravens preseason performance last night.
Curious what PFF grades are?
PFF's grades represent the most recent momentum of a player, or as they put it, "our rating is how good a player is right now." The grades are "represented through a 1 to 100 scale and [we] use a weighted depreciation over the past two years with more weight given to recent games." The green represent an uptick in performance, while red means the opposite.
PFF relies on a handful of analysts grading each and every play on a scale of -2 to 2, with -2 being a very bad play, and 2 being a very good one. For more info on PFF's grades, they can explain here.