Talent is important when it comes to fantasy football, but the key element for success is opportunity. It doesn't matter how talented a player is if he's not touching the football. Training camp battles can help determine the risers and fallers as we get closer to the start of the season. Here are some training camp battles to keep an eye on.

QUARTERBACKS

Chicago Bears

Coach Matt Nagy has been insistent Andy Dalton will be the starting quarterback to open the season. It's a matter of when first-round pick Justin Fields will take over. There's still a chance he has a great training camp and starts Week 1. Even if he doesn't, Fields will be the starter at some point. With his speed and running prowess, he will be fantasy-friendly and is worth drafting late as a backup QB in deeper formats even if he starts the season as a backup.

Denver Broncos

Drew Lock is coming off a disappointing season and the Broncos brought in Teddy Bridgewater. While Bridgewater won't take the Broncos to the next level, he's a competent, accurate quarterback. He can get the ball to the receivers. Bridgewater won't take many chances and limits the turnovers. Lock takes more chances and threw 15 interceptions in 13 games last season. The quarterbacks split reps in training camp and OTAs and both had good stretches and bad ones, but as expected the peaks and valleys varied more for Lock. This looks like a close battle.

New Orleans Saints

It appeared the consensus was Jameis Winston would be the starting quarterback. More recently, it sounds like Taysom Hill could be the starter. The lack of clarity has the Saints players devalued for now. Winston has started 70 NFL games and Hill has started four. When Drew Brees was out last season, the Saints went with Hill and he's being paid a lot of money. Winston has the talent and while he was prone to turnovers in Tampa Bay, his vision wasn't good and he had Lasik surgery to fix it. He had three offensive coordinators in five seasons with the Buccaneers. The offense centers around Alvin Kamara and Hill didn't throw to him as often when he was under center. With Hill at quarterback last season, they scored 24 points or fewer in three of the four games. While it's not fair to judge him on that alone, that isn't what a Sean Payton led offense is supposed to be. Winston will throw downfield more and get the ball to Kamara. 

San Francisco 49ers

Jimmy Garoppolo is the incumbent starter, but will have to hold off Trey Lance, who the 49ers selected third overall. Garoppolo has played 16 games once and the 49ers reached the Super Bowl that season. He played six games last season and the 49ers traded up to select Lance, who can win the starting job with an impressive training camp. Even if Garoppolo opens the season as the starter, he will have little margin for error. While Garoppolo will likely be the starter in Week 1, Lance should get his chance this season and is worth a stash as a late-round quarterback with a high ceiling since he can run and is surrounded by talent. The 49ers have a bye in Week 6 and if he doesn't start early in the season, it could be in Week 7. 

RUNNING BACKS

Arizona Cardinals

Chase Edmonds enters his fourth season with the Cardinals. He hasn't received more than 97 carries in a season and caught 53 of 67 targets last season. He has one carry inside the five-yard line in his career and lost goal line carries to Kenyan Drake last season. Drake is gone and the Cardinals brought in James Conner. If Conner steps into the Drake role, he could get most of the early-down work and goal line carries. The passing targets are more valuable in PPR formats and there's still a chance Edmonds gets most of the touches in the backfield. 

Buffalo Bills

Zack Moss and Devin Singletary are the backs vying for touches. Moss is going higher in drafts than Singletary. Bills running backs scored the fewest points in PPR formats last season. The Bills were a pass-heavy team, used a lot of four-wide sets and Josh Allen is going to run near the goal line. He has rushed for eight, nine and eight touchdowns the last three seasons. Singletary rushed for 687 yards on 156 carries last season with two touchdowns and caught 38 passes for 269 yards in 16 games, while Moss rushed 112 times for 481 yards with four touchdowns and caught 18 passes for 95 yards with a score in 13 games. The Bills also added Matt Breida. Unless the Bills make a change to the offense, this looks like a split backfield, Moss is the preferred option for fantasy.

Denver Broncos

If you look at early Average Draft Position (ADP), those drafting see this as Javonte Williams over Melvin Gordon. The Broncos selectEd Williams in the second round of the draft and it's an indication Williams will play a significant role even if it's not in Week 1. At some point, Williams will take over and fantasy players are aware of this. Williams had 1,445 yards from scrimmage last season at North Carolina and averaged 7.3 yards per carry and scored 22 touchdowns. The more positive news we get in training camp from Williams, the higher he will climb in drafts.

Jacksonville Jaguars

This is going to be a key battle. James Robinson was excellent last season as an undrafted free agent and was only the fourth undrafted player to rush for at least 1,000 yards. He was one of the top running backs in fantasy, but a new coaching staff in Jacksonville has no ties to him and drafted Travis Etienne in the first round. This could be a split backfield with Etienne getting most of the passing work. 

New York Jets

The Jets have rookie Michael Carter, Tevin Coleman, La'Michal Perine and Ty Johnson. Carter is the player people are betting on with his ADP climbing. Carter, a fourth-round draft pick, isn't a big back at 5-foot-8 and 201 pounds, but he's displayed the ability to be a dual threat. Jets coach Robert Saleh brought in Mike LaFleur to be the offensive coordinator and he worked with Kyle Shanahan since 2014 and those offenses tend to be running back friendly. Coleman knows the offense well and has played under a few of the Jets coaches, but is 28-years old and hasn't been able to stay healthy the last couple of seasons. Carter received the most reps with the first-team in OTAs. Johnson is a good stash late in deeper formats.

San Francisco 49ers

Kyle Shanahan backfields tend to produce excellent numbers. Raheem Mostert was productive when healthy last season, but missed eight games, scored three touchdowns and is 29-years old. Mostert missed OTAs with a minor knee injury. Jeff Wilson tore his meniscus in May and the team signed Wayne Gallman and drafted Trey Sermon in round three and Elijah Mitchell in round six. Sermon impressed in OTAs and will rise up draft boards with any positive news in training camp. The 49ers will use multiple backs, but they tend to run the ball often and the value of each back could change throughout the season. Sermon has the biggest ceiling.

Tampa Bay Buccaneers

This is a tough one to figure out. Leonard Fournette looked great in the postseason, but Ronald Jones was still involved in the offense, too. The Buccaneers signed Gio Bernard and it wouldn't be surprising if he becomes the pass-catching back, limiting the receptions for Fournette and Jones. Fournette had 82 touches in the postseason compared to 35 for Ronald Jones. Based on that Fournette could have the edge, but it's not guaranteed. This could be a committee all season.

WIDE RECEIVERS

Buffalo Bills

Stefon Diggs is the clear No. 1, but the Bills ran a lot of four-wide sets last season and were pass-heavy. John Brown is gone and the Bills added Emmanuel Sanders to go with Cole Beasley and Gabriel Davis. Beasley mentioned possibly retiring due to him being unhappy with COVID-19 protocols or he could get released. He had a broken leg at the end of last season and played through it. Beasley has been a Top 40 wide receiver the last two seasons in PPR formats and has a rapport with Josh Allen, but the ceiling is limited and he's dependent on volume. Sanders is stepping into the Brown role and Brown had over 70 yards in five of the seven full games he played. Sanders, 34, hasn't lost much of a step and can line up all over. He's an excellent route runner, a trusted veteran and is a good value. Davis is also worth a pick, but could play less snaps than Sanders.

Jacksonville Jaguars

The question is the order of targets between D.J. Chark, Laviska Shenault and Marvin Jones with a rookie quarterback Trevor Lawrence. Chark should lead the team in targets. He had an excellent season two years ago and wasn't as good last season partially due to the quarterback play. Coach Urban Meyer likes to run the ball and Travis Etienne will play a role in the passing game. Lawrence is a big improvement at quarterback. This looks like a situation where the ball is spread around, but Shenault has a lot of ability and could emerge as one of the top targets.