i would assume the coaches looked at the relative risk/reward of further injury vs. winning game and without a viable alternative they were then willing to risk the further injury/delayed recovery/limited mobility
Its vs the Browns, and instead of playing Ben who wasnt fully healthy, and possibly risk reinjury and more time away from the game, Landry should have been able to squeak out a win. But Landry went down, and who else @ QB do they have...