A knee injury has forced UFC veteran Chris Lytle (27-17-5 MMA, 6-9 UFC) out of a scheduled UFC Fight Nigh 19 bout with Carlos Condit.

Ken Pavia of MMAAgents.com, which reps Lytle, today told MMAjunkie.com (www.mmajunkie.com) the longtime UFC fighter and runner up on "The Ultimate Fighter 4" tore his meniscus and now has a "blown ACL."

The UFC has not officially announced Lytle's departure from the card, though the organization has ample to find a replacement for the Sept. 16 fight, which was part of the night's Spike TV-televised main card.

UFC Fight Night 19 takes place at the Cox Convention Center in Oklahoma City, Okla., and serves as a lead-in for the debut episode of "The Ultimate Fighter 10."

Lytle, fresh off a "Fight of the Night" victory over Kevin Burns at The Ultimate Fighter 9 Finale in June, has won two of his past three fights, the lone loss coming to Marcus Davis via split decision. Lytle continued his recent windfall by picking up his third straight "Fight of the Night" bonus and fourth overall. In fact, including fight-night bonuses for submissions and knockouts, he's won six bonuses in his past eight fights.

A timetable for the veteran's return is not immediately known.