2015 Cleveland Browns training camp preview

The Cleveland Browns open training camp on July 30 at the team's facility in Berea, Ohio. Here's a closer look at the Browns' camp, which wraps up on Aug. 24:

Top storyline: Josh McCown settled in to the quarterback position during a three-day minicamp in June, and the team has made every effort since to say that Johnny Manziel is a backup. That is a positive approach. The Browns need to stabilize the team's most important position by bringing McCown along in his knowledge of the system and in his role as the team's leader. They also must keep him healthy. The nonsense that has been past quarterback competitions needs to be eliminated, and the Browns have taken good steps in doing their best to do so. The competition last season almost swallowed Brian Hoyer and Manziel. McCown is 36 and is coming off a season in which he lost 10 of 11 games as Tampa Bay's starter. There are significant questions about his ability to improve on the Browns' seven-win season of a year ago. The team can do what it can to help him in camp by focusing on his growth in the system.

Position battles to watch: Cam Erving, the team's second first-round pick, will start training camp at right guard. Erving will be given the chance to play several positions up front, including right tackle, right guard and center. The right side seems to be his most likely landing spot if he takes a starting spot; Erving will be competing with Mitchell Schwartz at tackle and John Greco at guard. At running back, Terrance West and Isaiah Crowell will fight to be the starter, though rookie Duke Johnson figures to get plenty of time and touches. The starting back will be the primary back, though. Offensive coordinator John DeFilippo said he believes in going with the hot hand.

Veterans to watch: Dwayne Bowe was guaranteed $9 million by the Browns after a season in which he did not score a touchdown in Kansas City. Bowe has talked big since signing, but his production has dropped the past three seasons. If Bowe does not bounce back to the form he showed in 2010 and 2011, if he is on the back nine of his career, the Browns will have given a lot of money to a guy who will turn 31 in September. Cornerback Tramon Williams is in a similar spot. The Browns guaranteed him $10 million and gave him a three-year deal, numbers that were too rich and too long for his former team, Green Bay. At 32, Williams also has to show he has something left and can start opposite Joe Haden.

Rookies to watch: Danny Shelton and Erving will be the focus because they were the first-round picks. But running back Duke Johnson and receiver Vince Mayle could help greatly if they come through in camp. Johnson has quickness and pass-catching ability that was absent from the team's offense last season. He was most impressive in offseason work. Mayle missed most of the offseason work after having surgery to repair a broken thumb. He's a big, strong wideout who could bring a different element to the receiving corps.

Bubble watch: There are not a lot of veterans in trouble, mainly because the Browns started the rebuilding process after last season with a paucity of depth. Thus, anyone added should make the team. The one position group where there is a glut of talent, though, is the defensive line. The Browns added two linemen in the draft who should make the team and contribute in Danny Shelton and Xavier Cooper, and they signed Randy Starks as a free agent and gave John Hughes a contract extension. That puts a guy like Billy Winn in jeopardy -- not because he hasn't contributed, but because of the numbers at the position.

Backing the line: Defensive coordinator Jim O'Neil brought doubt into the equation when he said that linebacker Barkevious Mingo had to earn playing time while Scott Solomon was a nasty piece penciled in to be a force against the run. Solomon has been in the league three seasons and started zero games. Mingo is a first-round pick, the sixth overall in 2013. He was drafted to be a pass-rusher, but now the Browns tout his coverage ability. Mingo played with a shoulder injury that needed surgery after the season, but clearly the Browns want Mingo to take a step forward in 2015. If he doesn't, his future with the team may be in doubt.

For daily updates at camp, check out the Cleveland Browns clubhouse page.