On film, Blacklock has a quick twitch and flies to the ball.
Texans first-year defensive coordinator Anthony Weaver said in May you can't teach instincts in football, and Blacklock has great instincts.
The Texans are going to rely on the rookie to be a difference maker on their defensive line in 2020.
Only five teams had fewer sacks than the Texans last season.
Houston was next to last in quarterback hurries.
"In passing situations, Blacklock will play inside. If J.J. Watt stays at left end, Blacklock will play next to Charles Omenihu, who’ll play inside and outside in his second season. Next to Blacklock could be outside linebackers Whitney Mercilus or Jacob Martin.
"If Martin is rushing from the outside opposite Watt, Mercilus could shoot one of the middle gaps or drop into coverage.
"As the primary pass rushers, Watt, Mercilus, Blacklock, Omenihu and Martin could become a formidable five."
Blacklock, a Missouri City native, had 3.5 sacks and nine tackles for loss last season for TCU. He was returning from a ruptured Achilles tendon, which had been surgically repaired in 2018.
He was expected to be one of two additions key additions to the Texans' defensive line, with D.J. Reader leaving for the Cincinatti Bengals in free agency.