BALTIMORE - The Baltimore Ravens held off the Tennessee Titans, 24-18, but they lost Lamar Jackson in the process. Jackson injured his left ankle on the Ravens' final offensive snap of the first half and limped to the locker room as Tyler Loop's 64-yard field goal gave Baltimore a 24-7 halftime lead. Tyler Huntley took over on the first drive of the third quarter, as Jackson did not re-enter the game. A team source, speaking under condition of anonymity because they were not authorized to speak publicly, said Jackson was day-to-day. The Ravens did not score with Huntley leading the offense; they punted on their first four possessions of the second half, then Loop missed a 40-yard field goal attempt late in the fourth quarter. The Baltimore defense allowed the Titans to move the ball in the first half; they were saved by two Tennessee turnovers, one on an interception that bounced off running back Tony Pollard's hands, and another when Kyle Hamilton knocked the ball out of rookie receiver Carnell Tate's hands for a fumble after a long reception. But the Ravens held the Titans in check in the second half. Tennessee kicked a third-quarter field goal, but didn't cut the lead to one possession until the final two minutes. A Cam Ward fourth-and-long scramble-drill connection with Tate helped set up a short TD pass (the Titans converted a two-point conversion), but the Ravens secured an ensuing onside kick attempt to seal the win. Jackson was sharp before the injury. He was 15-for-20 for 222 yards and two touchdowns. The Ravens also lost right guard Andrew Vorhees (foot), tight end Durham Smythe (Achilles) and cornerback Marlon Humphrey (calf) to injury on Sunday. At 3-1, Baltimore is tied with the Browns atop the AFC North standings. The Titans dropped to 0-4. Box score | Week 4 live blog | Game discussion If Jackson's prognosis changes, do the Ravens have the kind of infrastructure that will allow Huntley to game-manage wins? Jackson is listed as day-to-day. That's good, because it will be a tall order for the Ravens to put Huntley in position to succeed. That's because the injuries run deep. Smythe, the team's best in-line blocker at tight end, went down with an Achilles injury. Right guard Vorhees was declared out quickly with a foot injury. That usually doesn't bode well. The Ravens are already on their fourth starting center since mid-August. Huntley showed that he can be trusted to make some plays, take care of the ball and manage the game last year when he led the Ravens to victories over playoff-bound Chicago and Green Bay teams. However, that will be a much bigger ask of the backup QB this year with the Ravens dealing with so many issues upfront specifically, and with the supporting cast in general. That was Baltimore's first look at Cam Ward - what kind of impression did the second-year QB make? The lone interception wasn't on Ward. He was about to be sacked and his shovel pass attempt bounced out of the hands of Tony Pollard and was corralled by Trenton Simpson. Ward didn't make any egregious mistakes, but he also didn't do enough against a Ravens defense that has struggled for much of the year and lost one of its better players in Humphrey early in the game. Ward seemed to get pretty good pass protection for much of the game, but he didn't get much going downfield and there are still too many moments when he hangs onto the ball for too long and looks unsure of himself. How did rookie Olaivavega Ioane and the new-look interior offensive line hold up? The Ravens asked a lot of Vega Ioane. Not only did he have to make the emergency switch from right guard to center, he had to do it against Jeffery Simmons and one of the best interior defensive lines in football. He also had to do it in rainy and wet conditions. Ioane performed admirably given the circumstances. There were a few off-the-mark snaps, but none that short-circuited any plays. The Ravens run-blocking wasn't especially good, but it would be hard to pin that all on Ioane. He stepped into a difficult spot and did his job. The same probably can be said for second-year pro Emery Jones, who entered the game at right guard when Vorhees went down and helped close it out.