There are a variety of ways in which a player can be put on notice.
When a player is perpetually injured, he gives himself fewer and fewer opportunities to earn his stripes on the field, which puts him in danger of losing his job to a healthier prospect. Other times, a player can be extremely healthy, but still unable to establish himself in any profound way, which puts his job in equal jeopardy.
Players with short-term contracts are on notice, as well, especially when they're unproven, perennially injured or getting older. Other times, a player is placed on notice by an incoming rookie or free agent who threatens to steal his job.
The Patriots have a handful of guys who fall into one category or another.
Here are six Patriots players who have been put on notice this offseason.