Huntley, who has tendinitis in his right throwing shoulder, had not attempted a pass during the media viewing portion of the past four practices. He was officially listed as a limited participant on Thursday, but it marked the first time since Jan. 1 that Huntley has been seen throwing passes.
"He looked good," Ravens offensive coordinator Greg Roman said. "It's day-to-day. He's making progress. We take stock on it every day."
The Ravens would likely start Huntley in Sunday night's wild-card game at the Cincinnati Bengals if Lamar Jackson remains sidelined. Jackson missed his 17th straight practice Thursday because of a sprained left knee.
On Wednesday, Harbaugh said Huntley was "on schedule." In four starts this season, Huntley has gone 2-2, throwing for 471 yards and two touchdowns with two interceptions. With that right shoulder issue, he has struggled to throw deep, completing just three passes that traveled at least 20 yards in the air (which ranks 27th in the NFL since Week 14).
Baltimore's offense has suffered a steep decline without Jackson. In his 12 starts this season, the Ravens averaged 23.1 points, which ranked ninth in the NFL. In five starts without him, Baltimore has averaged 13 points, which is second fewest in the league.
"Obviously, Lamar is Lamar," linebacker Patrick Queen said. "You can't replace that kind of guy, but I do still think that we have quarterbacks who can go out there and get the job done and play at a high level."
The Ravens are now a 9.5-point underdog to the Bengals after the line opened at six points. Since Harbaugh's first season (2008), Baltimore is 3-14 outright (.176) as an underdog of seven or more points.