The Buffalo Bills essentially are into evaluation phase for the rest of the season.
No player needs to absorb experience over the last four games more than rookie quarterback EJ Manuel.
The Bills and their weary fans still are learning about Manuel, who missed four games while recovering from a knee injury. He has looked good at times, and showed a flair for the dramatic with his game-winning touchdown drive against the Carolina Panthers in Week Two.
But one area of concern is his accuracy. Analytics site ProFootballFocus.com says Manuel has been the NFL's least-accurate passer this year.
Manuel ranks dead last out of the 30 quarterbacks who've handled at least 50 percent of their teams' pass plays. When the field is broadened to include quarterbacks who've handled 25 percent of their teams' pass plays, he is tied for 36th out of 38, ahead of only St. Louis Rams backup Kellen Clemens.
PFF's "quarterback accuracy percentage" metric takes a deeper look than standard completion percentage.
PFF gives the passer credit for dropped passes and does not consider the following incompletions: throwaways, spikes, batted passes or attempts while being hit.
Manuel's adjusted accuracy percentage is 66.4 percent, two-tenths of a percent worse than that of New York Jets rookie Geno Smith, who has completed 29 passes over his past four games.
On Manuel's 249 attempts, PFF counts 15 drops (he gets credit for a completion on those) plus two throwaways, one batted pass and four while being hit (he doesn't get faulted for any of those).
PFF's data tags Bills receiver Stevie Johnson for a team-high five drops, although that total also includes passes thrown by Thad Lewis and Jeff Tuel. Tight end Scott Chandler and receiver Robert Woods have four drops apiece.
But Manuel is in decent company at the bottom of PFF's chart. Tom Brady is ranked 20th, Colin Kaepernick 24th, Andrew Luck 25th, Eli Manning 26th and Joe Flacco 27th.
Aaron Rodgers ranks first, followed by Philip Rivers, Peyton Manning, Matt Ryan and Drew Brees.