Cecil Shorts got in front of the defense on a 67-yard catch and run to give Jacksonville a 14-7 lead early in the second quarter.
The Texans answered with a 1-yard touchdown reception by tight end James Casey to tie it again.
The teams exchanged field goals late in the second quarter to leave tied at 17-all at halftime.
NOTES: Posluszny received four stitches on his forehead after being injured in overtime. ... RB Jalen Parmele had 80 yards rushing. .... Gabbert was 2 of 2 for 24 yards before leaving the game. ... Graham's two touchdowns were a career-high.