The second-round pick out of Fresno State suffered an injury to his ribs and a concussion last Friday against Detroit. Allen said Carr, currently the Raiders' No. 2 quarterback, passed the concussion protocol but is still sore from the rib injury.
Carr practiced Monday, Tuesday and Wednesday.
Allen said Carr made improvements from Week 1 to Week 2 in the preseason. If his injury doesn't worsen, Allen expects him to play extensively in the preseason finale against Seattle on Aug. 28.