NASHVILLE, Tenn. – Titans quarterback Marcus Mariota has officially been ruled out for Sunday night's game vs. the Colts.
Mariota is among the team's inactives after being limited in practices all week. He was listed as questionable for the contest on Friday with neck and foot injuries. The Titans made the decision to keep him sidelined for the game because of the injuries.
Quarterback Blaine Gabbert will start for the Titans, while Austin Davis will serve as the team's No.2 quarterback.
The Titans, winners of four straight, need a win to advance into the playoffs.
Mariota suffered the injury late in the first half of last Saturday's game vs. the Redskins.
Gabbert stepped in for Mariota, and guided the Titans to a 25-16 win. The Titans won in Gabbert's only start of the season – a Week 2 win against the Texans.
Also inactive for the Titans: cornerback Kenneth Durden, running back Jeremy McNichols, linebacker LaTroy Lewis, guard Aaron Stinnie, tackle Tyler Marz, linebacker Brian Orakpo.
The Tennessee Titans prepare to take on the Indianapolis Colts in Week 17 of the 2018 season on Sunday, Dec. 30, 2018 at Nissan Stadium. (Photos: Donn Jones, AP)
Tennessee Titans quarterback Blaine Gabbert warms up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans quarterback Blaine Gabbert warms up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Fans watch as players warm up before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans punter Brett Kern (6) greets Indianapolis Colts punter Rigoberto Sanchez (2) before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Indianapolis Colts quarterback Andrew Luck, left, talks with Tennessee Titans quarterback Blaine Gabbert before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans punter Brett Kern (6) talks with Indianapolis Colts kicker Adam Vinatieri (4), long snapper Luke Rhodes (46) and punter Rigoberto Sanchez (2) before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans kicker Ryan Succop warms up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans punter Brett Kern (6) greets Indianapolis Colts punter Rigoberto Sanchez (2) before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Indianapolis Colts quarterback Andrew Luck, left, talks with Tennessee Titans quarterback Blaine Gabbert before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans kicker Ryan Succop warms up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
The NBC broadcast crew works before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Al Michaels, right, and Cris Collinsworth, second from left, broadcast from the field before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans fans walk across a bridge to Nissan Stadium before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/James Kenney)
Fans line up to tour an NBC broadcast trailer outside Nissan Stadium before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Humphrey)
NBC broadcasters work from the field in Nissan Stadium before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Country music star Keith Urban, center, talks with Tennessee Titans head coach Mike Vrabel and owner Amy Adams Strunk before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans fan Alex Cantu, of McAllen, Texas, arrives at Nissan Stadium before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Humphrey)
NBC broadcaster Cris Collinsworth, left, works on the field in Nissan Stadium before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Bryson McCarley tailgates outside Nissan Stadium before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Humphrey)
Tennessee Titans fan Onesimo Villarreal, of San Juan, Texas, arrives at Nissan Stadium before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Humphrey)
Ace Bailey, of Lynchburg, Va., runs a sprint outside Nissan Stadium before an NFL football game between the Tennessee Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Humphrey)
Tennessee Titans head coach Mike Vrabel, center, introduces Indianapolis Colts head coach Frank Reich, right, to people before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans owner Amy Adams Strunk, left, talks with country music star Keith Urban before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Indianapolis Colts quarterback Andrew Luck warms up before an NFL football game against the Tennessee Titans Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Injured Tennessee Titans quarterback Marcus Mariota watches as teammates warm up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans quarterback Blaine Gabbert warms up before an NFL football game against the Indianapolis Colts wSunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans cornerback Adoree' Jackson (25) warms up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans head coach Mike Vrabel, left, talks with Indianapolis Colts head coach Frank Reich before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Indianapolis Colts kicker Adam Vinatieri (4) talks with Tennessee Titans head coach Mike Vrabel before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans head coach Mike Vrabel, left, talks with Indianapolis Colts head coach Frank Reich before an NFL football game Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans quarterback Blaine Gabbert warms up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Injured Tennessee Titans quarterback Marcus Mariota watches as players warm up before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans linebacker Daren Bates (53) gets pumped up with inside linebacker Will Compton (51) before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/James Kenney)
Tennessee Titans defensive back Joshua Kalu (46) runs onto the field before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Indianapolis Colts head coach Frank Reich stands for the national anthem before an NFL football game against the Tennessee Titans Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Injured Tennessee Titans quarterback Marcus Mariota, center, watches as teammates warm up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Country music star Keith Urban serves as the Tennessee Titans' 12th Man before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/James Kenney)
Tennessee Titans punter Brett Kern (6) runs onto the field before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/James Kenney)
Tennessee Titans head coach Mike Vrabel watches as players stretch before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Injured Tennessee Titans quarterback Marcus Mariota stands with wide receiver Tajae Sharpe (19) before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans cornerback Adoree' Jackson (25) warms up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Injured Tennessee Titans quarterback Marcus Mariota talks with wide receiver Tajae Sharpe (19) before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Injured Tennessee Titans quarterback Marcus Mariota watches as players warm up before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans wide receiver Taywan Taylor (13) talks with injured quarterback Marcus Mariota before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans wide receiver Taywan Taylor (13) hugs injured quarterback Marcus Mariota before an NFL football game between the Titans and the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
Tennessee Titans quarterback Blaine Gabbert warms up before an NFL football game against the Indianapolis Colts Sunday, Dec. 30, 2018, in Nashville, Tenn. (AP Photo/Mark Zaleski)
