The Sooners didn't sign a defensive tackle prospect in last year's class, and Huggins became the first such commitment this year.
As the defensive-tackle situation begins to look better, though, offensive tackle has become a concern for OU, making Falah's visit all the more important.
Oklahoma's only offensive tackle commitment, Tulsa Union's Dalton Rodriguez, decommitted, choosing instead to play defensive end at Tulsa.
Falah (6-foot-4, 267 pounds) is the 16th-rated offensive tackle prospect in the country, according to Rivals.com.
As of now, Treadwell doesn't have any more official visits scheduled; he's narrowed his list of prospective schools to OU, OSU, Ole Miss and Michigan.