NASHVILLE, Tenn. (AP) Will Levis led touchdown drives on both his series and the Tenne see Titans beat the San Francisco 49ers 17-13 on Saturday night in the teams' preseason opener.The two scores were a product of not only two big special teams plays, but efficiency in operating a new offense under first-year Titans head coach Brian Callahan.We had no penalties until the second half, so that was really cool to see. Weve got a couple of things weve got to clean up. But that was our number one goal, and I felt like we did a good job, Levis said of the offense.Levis completed 4 of 5 pa ses for 35 yards, and capped the Titans' opening drive by scoring on a quarterback sneak.ADVERTISEMENT The 49ers opened the game, going 74 yards in 11 plays with Jordan Mason scoring from 4 yards out. Brandon Allen started at quarterback for the 49ers, who did not play starter Brock Purdy nor any of their first-team skill-position players on offense.For the most part, I dont play any Wes Hopkins Jersey starters in the first game, if you look at the history of how weve done it," 49ers coach Kyle Shanahan said. "So, thats usually how we are, sometimes I might feel differently, based on how things are going but nothings changing so far this camp.Tenne see answered with a big a sist from special teams. On their first return using the NFLs new kickoff rule, Kearis Jackson broke free through the center of the line for a 63-yard return. The 49ers were penalized 15 yards for sideline interference, setting the Titans up at the San Francisco 15. It took seven plays, and a 49ers defensive holding penalty, before Levis scored Tenne sees first touchdown on a 1-yard sneak.After forcing a punt by San Francisco on the next series, the Titans got the football back, and Levis directed a longer scoring drive, taking the Titans 64 yards in seven plays. Levis hit Calvin Ridley for a 22-yard catch and run on third down to get the drive going. Later, newcomer Tony Pollard added runs of 8 and 24 yards on the drive that was capped by Tyjae Spears 4-yard touchdown run on the first play of the second quarter.Anytime you can come out and put two scores on the board just to start out with our offense being a new unit with new faces, I think is a positive, Callahan said. Its nice to have succe s in preseason games. I think its important to sustain succe s and build some winning habits.Third-string quarterback Malik Willis directed a scoring drive in the fourth quarter that resulted in 34-yard field goal by rookie Brandon Narveson.The 49ers answered with a touchdown drive that ended with Joshua Dobbs 6-yard run into the end zone. The 49ers went for two, but were unsucce sful.Making an impactTitans backup linebacker Chance Campbell, whose play has been limited to just four games in two years due to injuries, had a big first half with a sack, three other tackles and a special teams hit. He also intercepted a Hail Mary from Dobbs on the final play of the game.Its awesome being healthy, said Campbell, who tore his ACL during his rookie season, then re-injured the knee four games into last season. I was just flying around, having fun and playing defense.Also, backup defensive tackle Keondre Coleman had a sack and a forced fumble for Tenne see.HomecomingWith Christian McCaffrey and Elijah Mitchell not playing in the game for the 49ers, Mason used the game against the Titans as a nice homecoming. Mason, who played high school football at Gallatin High, about 25 miles north of Nashville, rushed six times for 34 yards for the 49ers in the first quarter, including the touchdown run that gave San Francisco the 7-0 lead.New-look TitansThe Titans switch from a run-based offense that featured Derrick Henry for the past several seasons to a pa s-friendly system was evident on the stat sheet.The Titans threw the football 29 times, completing 19 for 198 yards between quarterbacks Levis, Rudolph and Willis.More importantly for the Titans, the offensive line held up well. Tenne sees only sack allowed came when Willis attempted to scramble and was stopped for a one-yard lo s by Kalia Davis. The offensive line yielded 64 sacks last season and was a point of emphasis in the off-season with the hiring of head coach Brian Callahans father, Bill, for that role.Guys were up and on their stuff. I felt well protected out there, Levis said of the lines play.Standing strongThe 49ers twice stuffed the Titans on fourth-and-1 plays to end Tenne see drives. The first one came on a replay challenge that overturned a run by Ha san Haskins that would have set up first-and-goal at the 1. That came in the second quarter on Rudolphs first series at quarterback, guiding the Titans second-team offense.The second stop came just acro s midfield when the Niners stuffed running back Jabari Small at the San Francisco 49 with 4:32 left to play in the game.InjuriesCornerback Ambry Thomas suffered a broken forearm in the game, Shanahan said after the game.Ambry Thomas ended up breaking his forearm. Itll be some time. Thats all weve got right now, Shanahan said.Up nextThe Titans have joint practices this week on Wednesday and Thursday against the Seattle Seahawks ahead of their Saturday preseason game at Ni san Stadium.The 49ers also have joint practices scheduled Jordan Mailata Jersey this week against the New Orleans Saints, who they face next Sunday.___AP NFL: