NASHVILLE, Tenn. >> Tennessee played without starting quarterback Marcus Mariota and top three offensive tackles against J.J. Watt, Whitney Mercilus and the rest of Houston’s challenging defense.

Mike Vrabel and his assistants responded with a few timely tricks for the Titans.

Ryan Succop kicked a 31-yard field goal with 1:00 left, and the battered Titans held off the Texans 20-17 today for Vrabel’s first victory as an NFL head coach against the team he worked for the past four seasons.

Succop also kicked a tying 42-yarder in the fourth quarter as Tennessee (1-1) delivered with Mariota, a Saint Louis alum, watching from the sideline.

“It’s a huge win,” Titans quarterback Blaine Gabbert said. “Getting Vrabes his first win as a head coach was awesome. And this team had a lot of adversity throughout the week. The guys fought their way to this win. I’m just extremely proud of those guys.”

Deshaun Watson and Houston had the ball last. With 17 seconds left, Watson ran around the field looking for a receiver. He found DeAndre Hopkins for a 31-yard completion to the Tennessee 21, but time expired before the Texans could run another play.

“We tried to take a shot,” Watson said. “We didn’t have any timeouts, and they guarded the sideline very well. My instincts took over and tried to get the ball and time ran out.”

Houston coach Bill O’Brien said they were trying to get in field goal range to force overtime.

“We’ve got to do a better job of coaching that play up,” O’Brien said.

Gabbert, starting for his fourth different NFL team, threw for 117 yards and a touchdown.

With Mariota sidelined by an elbow injury that created numbness in his throwing hand, Vrabel and the Titans (1-1) got creative. They dipped into the playbook and used some wildcat with Derrick Henry on offense, and All-Pro safety Kevin Byard set an NFL record when he tossed a 66-yard touchdown pass on a fake punt.

Tennessee allowed only one sack to Houston (0-2), which was missing a couple defensive starters in linebacker Jadeveon Clowney and end Christian Covington. The Titans came up with four sacks and an interception.

Watson threw for 310 yards and two TDs as Houston outgained Tennessee 437-283 in total offense.

On Tennessee’s opening drive, Byard hit a wide-open Dane Cruikshank down the right sideline. Byard’s TD pass was the longest by a defensive player in the Super Bowl era , easily topping the mark set by Rams defensive back Ed Meador on Nov. 19, 1967.

On the next drive, the Titans went with the wildcat with Henry before Gabbert finished the drive with a screen pass to Taywan Taylor, who went 18 yards for the TD and a 14-0 lead before the end of the first quarter.

Titans cornerback Adoree Jackson got his first interception in the NFL, beating Hopkins for the ball in the end zone.

INJURIES

The Titans played without two-time Pro Bowl left tackle Taylor Lewan, who is recovering from a concussion. Right tackle Jack Conklin has yet to return after tearing a ligament in his left knee in January. Dennis Kelly, who had replaced Conklin, was out with an illness.

The Titans started Kevin Pamphile, a free-agent signee in March, at left tackle and Taylor Marz, signed off the practice squad, on the right side.

Titans running back David Fluellen hurt a groin muscle in the first quarter and did not return.

UP NEXT

Texans: Home opener against the New York Giants.

Titans: A second straight AFC South opponent with a trip to Jacksonville.