Throw it sidearm at your own peril.

Falcons going for it on fourth-and-1.

Ravens CB Jimmy Smith has cleared concussion protocol.

Michael Crabtree drops a third-down pass that hit him in the hands. But Sam Koch finds Chris Moore on a fake punt and they're back in business.

Lamar Jackson vs. Sam Koch. Do the Ravens have a quarterback controversy on their hands?

Joe Flacco has eight turnovers (six interceptions, two fumbles) in nine games. Lamar Jackson has four turnovers (three interceptions, one fumble) in three games. Sam Koch hasn't thrown a pick this season.

Lamar Jackson now has been involved in three fumbles today. The Ravens have recovered two of them. The one they didn't cost them dearly.

Marlon Humphrey is penalized for initiating contact with the helmet. Looked like his helmet or elbow. Falcons on the move again after avoiding a deep three-and-out.

Matt Ryan has had just one game this season in which he's completed less than 68.4 percent of his passes. So far, he's 7-for-15 (46.7 percent).

Ravens' first drive: nine plays for 70 yards and a touchdown. The rest: three for 6 yards, six for 23 yards (fumble), six for 15 yards, three for 8 yards.

The Ravens defense has been awesome today. The Falcons entered today averaging 6.2 yards per play, No. 6 in the NFL. After that Za'Darius Smith sack, they're down to 2.8.

In what's commonly known as the two-minute drill, the Ravens took nearly a minute to run three plays and gain 19 yards.

The Ravens' first and last drives of the half have been their best. They'll send Justin Tucker out for a 41-yard FG to all but end the half.

Falcons take a knee and head to the locker room. This is the first game the Ravens will enter halftime not leading with Lamar Jackson as starter.

Halftime update on today's dull QB duel:

Matt Ryan: 9-for-17, 77 yards, 65.1 QB rating.
Lamar Jackson: 10-for-16, 96 yards, 79.2 QB rating.
Sam Koch: 1-for-1, 21 yards, 118.8 QB rating.

Mark Andrews has been really good today (three catches on three targets for 47 yards), and just drew a pass-interference penalty. He looks so much faster than he was in training camp.

Jermaine Eluemunor in at left tackle for the Ravens.

Pretty sure Lamar Jackson just went into the blue tent. He was walking along the sideline with a trainer beforehand.

Ravens announce Lamar Jackson is in concussion protocol. Robert Griffin III is coming on.

Robert Griffin III last threw a regular-season pass on Jan. 1, 2017, about three weeks after Lamar Jackson won the Heisman Trophy.

Lamar Jackson is in the locker room. The Ravens' emergency quarterback is ... Sam Koch.

TE Maxx Williams has a stinger and is also in concussion protocol. LT Ronnie Stanley has returned, however.