This article is part of our NFL Barometer series.
As we come off a very interesting Week 4, a word about the Bears' offensive explosion that qualified as the most surprising of Sunday's outcomes: You won't find any Chicago players listed as Trending Up yet this week despite their respective performances, as we need to see more than one week against a non-Buccaneers secondary to really believe they're headed in the right direction. Given Mitchell Trubisky's struggles through the first three games of the season, a "buffer period" is warranted as the team heads into a Week 5 bye.
However, there were plenty of other longer-term trends that persisted in Week 4, so let's dive right into looking at who either continued rising or falling.
Joe Flacco, Ravens: Flacco is a good example of a quarterback who has seemingly proven an old dog can learn new tricks after four impressive efforts to open the season. The veteran exploded for 363 yards against the Steelers on Sunday night, and he'd touched up the Bengals for 376 yards just two games prior. Those two performances have been sandwiched around a solid 276-yard effort against the Broncos in Week 3, and overall, Flacco is taking advantage of new weapon John Brown to bump his YPA up from last year's career-low 5.7 to 7.3, the second-highest figure of his career.
Derek Carr, Raiders: The team's record isn't pretty, but Carr is unquestionably thriving under head coach Jon Gruden. The 2014 second-round pick racked up a