JACKSONVILLE, Fla. (AP) - Blake Bortles fumbled on Jacksonville's third play of each half, leading to 10 points and his benching in a 20-7 loss to the streaking Houston Texans on Sunday.

The Texans (4-3) won their fourth consecutive game thanks to those two turnovers and took a one-game lead in the AFC South.

Deshaun Watson, who reportedly made the 800-mile road trip by bus instead of plane, had a touchdown pass despite playing with a bruised lung and injured ribs. Lamar Miller ran for a season-high 100 yards and a score .

Watson's health and Jacksonville's quarterback situation surely will be the main topics going forward.

Cody Kessler replaced Bortles in the third quarter and threw a short touchdown pass to T.J. Yeldon , creating speculation he might supplant Bortles in the starting lineup.

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JACKSONVILLE, FL - OCTOBER 21: Cody Kessler #6 of the Jacksonville Jaguars passes the ball during the second half against the Houston Texans at TIAA Bank Field on October 21, 2018 in Jacksonville, Florida. (Photo by Sam Greenwood/Getty Images)

The Jaguars (3-4) signed Bortles to a three-year, $54 million contract in February with the belief he was good enough to lead the defensive-minded team back to the playoffs. Bortles has been downright awful in three straight losses, with two touchdown passes and eight turnovers.

Coach Doug Marrone clearly had seen enough when he made the switch Sunday. Marrone also benched Bortles in the 2017 preseason, only to give him the starting job back nine days later.

Bortles played turnover-free football in the postseason, gaining top executive Tom Coughlin's confidence and landing the new contract. Now it's unclear how much of the money he will get.

Bortles lost the ball both times trying to scramble. The first one led to a field goal, and Watson connected with DeAndre Hopkins for a 10-yard score following the second one . That was one of several one-on-one matchups Hopkins won against talkative cornerback Jalen Ramsey.

Hopkins' best was a one-handed catch for 31 yards along the sideline in the first quarter.

The Texans led 13-0 at the break, the third time in as many games Jacksonville has failed to score before halftime. The Jaguars had never done that previously in franchise history.

They also had scoreless halves against Kansas City (24-0) and Dallas (20-0), so the Jags were outscored 57-0 in the first half in three straight weeks.

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Jaguars: Face Philadelphia in a "home game" at Wembley Stadium in London.