Hector Lombard will make his welterweight debut against Nate Marquardt at UFC 166.

The battle between former champions in Bellator and Strikeforce will go down October 19 from the Toyota Center in Houston. The main event features Cain Velasquez defending his UFC heavyweight title vs. Junior dos Santos.

Lombard (32-4-1) is a former Bellator middleweight champion, but has decided to move down to better compete in the UFC. Marquardt (32-12-2) recently returned after a stint in Strikeforce in which he captured the title.

The bout was first reported by MMAFighting.com.