Cassel was cleared for non-contact practice on Tuesday, and Crennel said Cassel and Quinn will split practice reps Tuesday and Wednesday as the Chiefs spend their bye week preparing to host the Oakland Raiders on Oct. 28.
At Arrowhead Pride, Joel Thorman said he thinks Crennel should act quickly.
What the Chiefs should do -- and I'll get into this later -- is pick one quickly and stick with it. You don't want to enter into a situation where both players are splitting reps all week, getting half of the amount of work they need as the starter.
Cassel sat out Sunday's 38-10 loss to the Tampa Bay Buccaneers with a concussion. He threw nine interceptions in his first five games, a span over which the Chiefs committed 19 turnovers.
Quinn wasn't a marked improvement Sunday. He was 22 of 38 for 180 yards and two interceptions in the loss to the Buccaneers. His quarterback rating was 48.1.