Howell spent part of the week in Minneapolis meeting with a specialist to decide what the best action would be to take with his neck. Colts officials are expected to talk to the doctors at some point Friday.
It's unknown how long Howell will be out. A neck injury caused Howell's 2013 season to end early.
"Anytime there's anything with a neck, you have to cross your T's and dot your I's," Colts general manager Ryan Grigson said earlier this week. "That's a serious area. It's something that's been nagging him. He's going through the whole entire process of seeing multiple people so he can formulate that opinion with his wife and his agent and himself and us and make the decision that's best for Delano."