"It's already been reported, so just go with that," Harbaugh said at his weekly news conference Oct. 9. Harbaugh has said he won't be giving details on injuries unless they are season-ending.
Earlier Oct. 9, NFL Network's Ian Rapoport tweeted that West "got good news on his MRI. Expected to miss some time, but not an extended absence."
Harbaugh said the Ravens are working on a plan to compensate for West's short-term absence but offered no details.
"We'll wait until we know," Harbaugh said. "I don't want to put plans out there until we know if we can pull it off."
The Ravens presumably will want to add a third running back to the 53-man roster in advance of the Oct. 15 game against the Chicago Bears. The Ravens have used all three running backs -- West, Alex Collins and Buck Allen -- extensively this season. Collins has 37 carries for a team-high 261 yards, and his average of 7.1 yards per carry leads the league. But he has fumbled twice in four games. Allen has a team-high 66 carries for 232 yards, and West has 39 carries for 138 yards and two touchdowns.
West, a Baltimore native and former Towson University star, has started four of the first five games, but his workload has diminished the past few weeks with the emergence of Collins, who was promoted from the practice squad after Week 1. Allen is the team's top pass-catching back. West carried twice for 17 yards against the Raiders before being injured.
The Ravens have one running back on the practice squad in John Crockett, who was signed Sept. 21. He played two games with the Green Bay Packers in 2015 and was with the Raiders in training camp this summer.
Ironically, this week the Ravens could see Taquan "Smoke" Mizzell, the undrafted rookie running back who impressed in training camp for the Ravens but did not make the 53-man roster and then was claimed off waivers by the Bears. Mizzell is on the Bears' 53-man roster but has not played a snap.
HARBAUGH PRAISES LINE: Harbaugh again gave credit to the offensive line for the way they controlled the line of scrimmage during the Ravens' 30-17 win at Oakland. The Ravens, already without Pro Bowl guard Marshal Yanda, lost guard Matt Skura to a knee injury during the game, so rookie Jermaine Eluemunor took his place. Those two, plus tackle Ronnie Stanley, guard James Hurst, center Ryan Jensen and tackle Austin Howard held their own against a Raiders defensive front that Harbaugh said featured ""three really good edge and inside pass rushers," including reigning Defensive Player of the Khalil Mack.
Quarterback Joe Flacco was not sacked at all and was hit just twice. The Ravens also piled up 143 rushing yards and put together a 13-play, 54-yard drive that ate up more than six minutes of the fourth quarter. Harbaugh said Jensen, in his first year as the starting center, played his best game of the year.
PERRIMAN MAKES 'HUGE PLAY', RAVENS LOOKING FOR MORE: Receiver Breshad Perriman made his best catch of the season with a diving grab across the middle for 13 yards on third-and-3 after the Raiders had trimmed the Ravens’ lead to 24-17. The Ravens scored a field goal on that drive to increase their lead to 10. Perriman, who missed most of training camp with a hamstring injury, had been a non-factor this season. He entered Sunday's game with two catches for 11 yards and had been hurt by a couple of drops. "He's here to make plays," Harbaugh said. "He made a huge play on that third down."
Despite Perriman's slow start this season, Harbaugh continued to vouch for the potential of the Ravens' 2015 first-round draft pick, who has missed one full season and virtually all of his three training camps with injuries. "If you don't think they can do it, you're not going to have them around. We don't just keep guys around just for charitable reasons. This is a business and this is world-class competition. ...
"When you see that a guy can do it," Harbaugh added, "then you feel like he can do it consistently, and that's what he's got to prove now. He'll say, 'Give me more chances.' And I'll say, 'Earn more chances.' " And he did that this last game."