For the season, Brown has caught four passes for 46 yards on five targets.
"He did a good job, made a couple plays, third-down conversions that were very important," Harbaugh said. "Big target, gets off press [coverage] really well, blocks and he did a good job on special teams."
The Pro Bowl kick returner dropped an accurate pass from Joe Flacco for the second consecutive week. It was the only pass thrown to him Sunday. He played just seven offensive snaps.
Jones has caught just three passes for 20 yards on 10 targets this season. His longest catch is 11 yards.
He's unofficially dropped five passes.
Jones was expected to have a bigger role in the Ravens' offense this season because of his background in offensive coordinator Gary Kubiak's offense with the Houston Texans. He's on pace to catch 16 passes for 106 yards.
Jones caught 37 passes for 455 yards and two touchdowns last season.
Jones signed a four-year, $12.055 million contract in March that includes a $3.5 million signing bonus and a $1 million base salary this season. He has a $500,000 incentive clause for catches that he's unlikely to trigger.
"He works hard at it, he catches hundreds of balls on the Jugs [machine] every single day," Harbaugh said. "He catches the ball in practice. Sometimes, I think he's pressing. I really do. Jacoby has a lot of pride and he's made a lot of big, big plays in the league before and he wants to pick up where he left off. The key is persistence. You just keep hammering and you don't get down on yourself. and it'll work out."
Meanwhile, five-time Pro Bowl wide receiver Steve Smith has 25 catches for 429 yards and three touchdowns since signing a three-year, $11 million contract in March.
At the quarter pole of the season, Smith is on pace to finish the season for 100 receptions for 1,716 yards and a dozen touchdowns. He's been targeted 41 times.