Because of free agency and salary cap constraints, teams have to build squads and hope that big free agent signings and draft picks can come off and make a team better. The way the Patriots are built though, they do not go after high priced free agent players that play in the skill positions of Wide Receiver, Running Back or Tight End. They prefer to bring in low key figures or draft players who they feel are the best fit for their system and inevitably there are some hits and a fair few misses along the way. As previously mentioned, Brady has had a number of these specific players to work with throughout his career and not many of them have stayed in New England a long time, the longest being Troy Brown at eight seasons (2000-2007). This has meant that the Patriots offense has taken many shapes and forms in the Brady era, while still being good enough to win four Super Bowl, appear in six and make nine AFC Championship games (all NFL records). All this being compared to the settled offense that Montana had with him in the 1980s in San Francisco.