Turnover is generally always high in the NFL. It's the nature of the business. Since the beginning of free agency back in the early 1990s, NFL teams have to strategize with the salary cap in order to help decide which players to keep and which players to move on from.
This offseason, John Elway and his staff elected to make the biggest splashes through trades, acquiring both A.J. Bouye and Jurrell Casey in swaps with the Jacksonville Jaguars and Tennessee Titans, respectively.
The team also signed Graham Glasgow and Melvin Gordon as priority free agents, but there were a few players who moved on for more money, a better opportunity or were just weeded out by the team.