Free agency and the beginning of the 2019 league year are fast approaching.

While the high-profile news in the offseason is about who teams are adding, either through free agency or the draft, having a good idea of who teams are losing can be key to finding fantasy football value.

In 2018, 64 different players accounted for at least 15% of their team's targets, so it doesn't take a whole lot of volume to lift a player into fantasy football relevance. Five of those 64 are set to become unrestricted free agents, two will become restricted free agents and one will likely be traded. That means we can expect some serious shakeup in both the NFL and the fantasy football landscape.

For some teams, this can mean they'll need to bring in new players to fill the voids, potentially bringing volume to a player who hasn't seen it before, or helping maintain the fantasy value of a player who got plenty of looks in their old home.

For others, losing a big share of their 2018 volume will open opportunity for players (often young players) that have been buried on the depth chart, but whose value could blow up with a full workload at their disposal.

Let's get right into it and look at the five offenses with the most volume available in the passing game for 2019.