Training camp is the staging ground for NFL players to win and lose jobs, which is compelling for fans and, of course, fantasy football owners. It’s an important time for those fantasy mavens to gather intelligence that might allow them to identify and exploit a market inefficiency and find a sleeper.

So here’s a look at 12 position battles around the NFL that are worth monitoring during camp. Even if the coach or team fails to indicate which player will win the starting role before your fantasy draft, you may be able to glean enough information from preseason and training camp coverage to find a player who carries you to the finals in your league.

1. Rams’ RBs: Todd Gurley vs. Darrell Henderson

Gurley is reportedly dealing with arthritis in his knee, and the Los Angles Rams elected to draft Henderson in the third round. Coincidence or correlation? We’ll see if Henderson is good enough to justify resting Gurley’s knee and weakening his fantasy value.

2. Seahawks’ RBs: Chris Carson vs. Rashaad Penny

Carson unexpectedly finished fifth in the NFL in rushing yards (1,151 and nine touchdowns) after the Seahawks drafted Penny in the first round of the 2018 NFL Draft. But this season, Penny will get another shot to take on a bigger workload, particularly in the passing game.

3. Buccaneers’ RBs: Peyton Barber vs. Ronald Jones

I’m putting this Barber-Jones running back battle after Cason-Penny because they’re similar in many ways,. The Bucs drafted Jones at 38th overall in the 2018 NFL Draft to supplant Barber, but the veteran remained in the starting role, in part because of how bad Jones was. That could change in 2019.

4. Redskins’ RBs: Adrian Peterson vs. Derrius Guice vs. Chris Thompson

Thompson will get his touches in the passing game, as he is one of league’s premier pass-catching backs. But Guice and Peterson will battle for the touches on early downs. Peterson signed with the Redskins in 2018 after Guice tore his ACL.

5. Dolphins RBs: Kenyan Drake vs. Kalen Ballage

New Dolphins coach Brian Flores and his offensive coordinator Chad O’Shea come from New England, where they generally do running back by committee. It’s easy to imagine these players splitting carries. Rookie running back Myles Gaskin is also a dark horse to complicate the position battle.

6. 49ers RBs: Tevin Coleman vs. Jerick McKinnon vs. Matt Breida

The 49ers signed McKinnon last offseason to an oversized deal before he tore his ACL. That allowed the emergence of Matt Breida. San Francisco then signed Coleman to an oversized deal this offseason. They clearly like all the backs, which makes the starter so hard to predict.

7. Broncos WRs: Courtland Sutton vs. DaeSean Hamilton vs. Emmanuel Sanders

Sutton seems like a breakout candidate in the making, but he’ll have to surpass Sanders on the depth chart. That may not be too hard. Sanders is taking a conservative approach as the team begins training camp, which means Sutton and Hamilton will get more time developing rapport with Joe Flacco and Drew Lock.

8. Steelers’ WRs: James Washington vs. Donte Moncrief vs. Diontae Johnson vs. Eli Rogers

Who is going to take some heat off JuJu Smith-Schuster? Ben Roethlisberger publicly criticized Washington last year. Moncrief hasn’t impressed in any offense

9. Seahwawks’ WRs: D.K. Metcalf vs. David Moore vs. Jaron Brown

Tyler Lockett did a nice job picking up the slack for a declining Doug Baldwin. But erasing Baldwin’s name from the depth chart will create a tremendous opportunity. Metcalf makes the most sense, considering his pedigree as a second-round draft choice, which seemed like a considerable fall for a player who had first-round talent (and a physique for WWE).

10. Patriots’ WRs: N’Keal Harry vs. Demaryius Thomas vs. Josh Gordon (?)

For the Patriots’ pass-catchers, there’s Julian Edelman and then … who-knows-what. That goes for both the receiver and tight end positions. That means that the team’s No. 2 wideout will have a tremendous fantasy opportunity. Considering Thomas has started the season on the PUP list and Gordon’s suspension status is still an uncertainty, Harry is becoming a quick front-runner.

11. Buccaneers’ TES: Cameron Brate vs. O.J. Howard

Jamies Winston loves his tight ends, and seems to favor Brate over Howard, even if Howard is probably more talented than Brate. Both tight ends were fantasy relevant in 2018, but can one of them establish himself as the go-to option at tight end?

12. Dolphins’ QBs: Ryan Fitzpatrick vs. Josh Rosen

Maybe this battle will only be relevant in 2QB leagues. But doesn’t Fitzpatrick find a way to inexplicably make himself fantasy relevant for a few weeks? If Rosen wins the job for Week 1, we may have to turn off our Fitzmagic sensors. Then the question is whether Rosen is worth keeping in dynasty leagues and worth starting in 2QB leagues.