HOUSTON (KTRK) -- The Houston Texans will bring back quarterback Case Keenum.Sports reporter David Nuno confirmed the Texans will sign Keenum to the squad to replace the injured Ryan Fitzpatrick.Houston lost starting quarterback Ryan Fitzpatrick early in the second quarter with a left leg injury. Fitzpatrick was carted off the field with an air cast covering the leg.Coach Bill O'Brien would not confirm reports that Fitzpatrick's leg was broken."I felt for him because he knew right away that it was injured," O'Brien said.Without Fitzpatrick, the Texans turned to rookie Tom Savage. He completed his first NFL pass for a first down, then struggled. Savage finished 10 of 19 for 127 yards with two fumbles and two turnovers.Late in the fourth quarter, Savage also took a hit to his knee and it looked like he was going to have to come out of the game. Savage managed to stay in, but threw an interception on 4th down. He was seen on crutches after the game and is expected to have an MRI today.If Savage is unable to suit up again, Keenum and Thad Lewis would be the only remaining quarterbacks on the Texans roster. Lewis was inactive for the Texans game Sunday against the Colts.Keenum most recently was on the St. Louis Ram's practice squad. Keenum set NCAA records for passing yards, touchdowns and completions while at the University of Houston. However, he wasn't drafted after his senior year. The Texans signed him as a free agent in 2012 and he took over as starter for Matt Schaub in a disastrous 2013 season, in which the Texans went 2-14.While the Texans starter, Keenum was 137 for 253 for 1,760 yards. He threw 9 touchdowns and had 6 interceptions.