John McClain of the Houston Chronicle first reported the deal, which the Texans announced on Friday. Clowney, the No. 1 overall pick in May's draft, inked a four-year contract.
Clowney became the 18th first-round pick to sign a contract and, logically, the rest will start filling in now that the No. 1 pick has signed.
His deal, per the new CBA, will also contain a fifth-year team option. McClain reports the deal is worth $22.27 million, slightly up in terms of rookie contracts, but appropriately slotted.
Even though he's transitioning to linebacker in a 3-4 defense (Clowney was primarily a 4-3 rush end at South Carolina), the freakishly athletic Clowney pairing with J.J. Watt should give first-year defensive coordinator Romeo Crennel the ability to wreak havoc on opposing offenses.