The Texans announced Tuesday it had signed all five draft picks from April.
"Everything that I worked for prepared me for this moment," the caption read, accompanied by two photos of the Missouri City native signing paperwork. "It's Official, Thank you @houstontexans for giving me the opportunity to live out my dreams, forever grateful---- #HOMETEAM--❤️--"
Blacklock, a defensive lineman from TCU, was the 40th overall pick in the second round of the 2020 NFL Draft, and the Texans' first selection.
The Texans traded All Pro wide receiver DeAndre Hopkins to the Arizona Cardinals for the 40th pick, running back David Johnson, and a swap of fourth-round picks.
Third-round pass rusher Jonathan Greenard signed his deal with the Texans in May. Greenard was drafted 90th overall out of Florida.
Offensive tackle Charlie Heck, drafted in fourth round (126th overall) from North Carolina, also signed his deal in May.
The Texans most recently agreed to terms with cornerback John Reid, who was drafted later in the fourth round (141st overall) from Penn State.
Coulter, the Texans' final 2020 pick (171st overall), played wide receiver at Rhode Island.
