I am not really big on Teyo Johnson. He was a second round pick that could not last more than two years with the Raiders. That is understandable, and maybe he could turn his career around. Then, he signs with the Cardinals. Now remeber the Cardinals top TE's are Bobby Blizzard and Eric Anderson. Yet, the Cardinals also become dissatisfied and release him. These are two bad teams that cut him, and both dont even have a quality TE. And the Dolphins dont even think the world of him. They signed Justin Peele to be the top backup, plus they already have Alex Holmes. Teyo is probably a "body" with the possibility of him resurrecting his talent. If he is lucky, he will be the third TE. Dont get your hopes up.
Fred Gibson was a fourth round pick last season that could not even make the Steelers practice squad. Only DT Attiyah Ellison and Maurice Clarett were higher picks who did not make there teams. Also, Gibson was never able to impress the Dolphins enough to ever bring him on to the active roster despite injuries to the Dolphins WR core. However, unlike Teyo I believe that Gibson has a realistic chance of fixing what is wrong and maybe becoming the Fins 5th reciever.
Dont get too excited about either player, in fact there are other signings like Deke Cooper and Andre Goodman that should have excited people around here more.