San Francisco 49ers quarterback Blaine Gabbert drops back to throw during the first half of an NFL preseason football game against the Houston Texans, Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Tony Avelar)

Houston Texans running back Lamar Miller carries the ball during the first half of an NFL preseason football game against the San Francisco 49ers Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Ben Margot)

Houston Texans outside linebacker John Simon runs with the ball for a touchdown on a 41-yard fumble recovery during the first half of an NFL preseason football game against the San Francisco 49ers Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Ben Margot)

Houston Texans outside linebacker John Simon, left, is greeted by teammate Max Bullough after scoring a touchdown on a 41-yard fumble recovery during the first half of an NFL preseason football game against the San Francisco 49ers on Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Ben Margot)

San Francisco 49ers tight end Vance McDonald runs with the ball for a touchdown past Houston Texans strong safety Quintin Demps (27) and inside linebacker Benardrick McKinney (55) during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Ben Margot)

San Francisco 49ers tight end Vance McDonald celebrates after scoring a touchdown during the first half of an NFL preseason football game against the Houston Texans, Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Tony Avelar)

Houston Texans quarterback Brock Osweiler, left, looks to throw as San Francisco 49ers outside linebacker Ahmad Brooks, right, looks on during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Ben Margot)

San Francisco 49ers outside linebacker Ahmad Brooks celebrates after sacking Houston Texans quarterback Brock Osweiler during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Tony Avelar)

Houston Texans defensive back Charles James (31) breaks up a pass intended for San Francisco 49ers wide receiver DiAndre Campbell during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Tony Avelar)

San Francisco 49ers running back Mike Davis, left, runs with ball near the end zone past Houston Texans defensive back Corey Moore during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Tony Avelar)

San Francisco 49ers running back Shaun Draughn, right, tries to carry the ball past Houston Texans linebacker Brian Peters during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Tony Avelar)

San Francisco 49ers running back Mike Davis (22) carries the ball past Houston Texans defensive back Robert Nelson, bottom, and free safety Andre Hal (29) during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. In the background is 49ers tight end Blake Bell (84). (AP Photo/Tony Avelar)

Houston Texans quarterback Tom Savage is sacked by San Francisco 49ers linebacker Nick Bellore during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Ben Margot)

San Francisco 49ers coach Chip Kelly gestures on the sidelines during the first half of the team's NFL preseason football game against the Houston Texans on Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Tony Avelar)

San Francisco 49ers quarterback Thad Lewis runs with the ball as Houston Texans linebacker Eric Lee (47) gives chase during the first half of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Ben Margot)

Houston Texans tight end Stephen Anderson (89) is greeted by Tony Bergstrom (68) after scoring a touchdown during the second half of an NFL preseason football game against the San Francisco 49ers on Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Tony Avelar)

Houston Texans quarterback Tom Savage looks to throw during the second half of an NFL preseason football game against the San Francisco 49ers on Sunday, Aug. 14, 2016, in Santa Clara, Calif. (AP Photo/Ben Margot)

San Francisco 49ers coach Chip Kelly, left, shakes hands with Houston Texans coach Bill O'Brien at the end of an NFL preseason football game Sunday, Aug. 14, 2016, in Santa Clara, Calif. Houston won 24-13. (AP Photo/Tony Avelar)