Answer based on context:

After playing three of their first four games on the road, the Raiders returned home for the first of three straight home games against Baltimore. Without Derek Carr due to a fracture in his back, EJ Manuel started for the Raiders. The Raiders defense again struggled, giving up 365 total yards, 222 through the air. Joe Flacco and Mike Wallace torched the Raider secondary, connecting on three passes of more than 20 yards. A 52-yard pass from Flacco to Wallace set up the first Raven touchdown on their first possession. Trailing 7-0, Raider tight end Jared Cook fumbled on the ensuing possession and Jimmy Smith returned the fumble 47 yards to put the Raiders in 14-0 hole with over 11 minutes remaining in the first quarter. The Raiders marched 61 yards on 12 plays on their next possession, but had to settle for a Giorgio Tavecchio 32-yard field goal. The Ravens extended the lead on their next possession, going 75 yards on 15 plays before Javorius Allen plunged in from one yard out to extend the lead to 21-3 early in the second quarter. EJ Manuel would find Michael Crabtree on a 41-yard touchdown pass following a scramble, but the Ravens added a field goal before the half to move the score to 24-10. In the second half, the Raiders pulled within a touchdown following a Marshawn Lunch three-yard score. However, the Raider offense could muster no more as EJ Manuel was sacked three times in the game and was under constant pressure from the Ravens. Two more field goals by the Ravens extended the lead to 30-17 with just over two minutes remaining and sealed the Raiders' third straight loss on the season.

How many field goals did the Ravens have?
3