The O's were "intrigued" by right-handed starter Tim Hudson and discussed him internally. I'm not sure they ever made him an offer, though, and he ended up signing on with the San Fransisco Giants for two years.
Hudson would have fit into the O's rotation perfectly, right behind Chris Tillman. Hudson is a veteran who knows how to pitch with great career numbers and postseason experience. The Giants are getting a good pitcher.
Now that the O's don't have a chance to go hard after Hudson, they could turn their attention to any one of three other free-agent arms to help fill out their rotation.