NFL training camp: Top offensive position battles for Arizona Cardinals entering camp

The Arizona Cardinals start training camp this coming Friday and the team's first practice will be on Saturday. As it happens every year, there will be some positional battles decided in practice and in the preseason. Here are some for this year, not in any particular order.

Battle for RB2: David Johnson, Stepfan Taylor, Kerwynn Williams, Marion Grice

The entire world believes it will be Johnson, as that was the reason he was drafted ultimately, but Williams did well as the starter last season, showing he has potential, while Taylor has the history with Arians and the team still is intrigued by Grice's talent.

Battle for starting center: A.Q. Shipley, Ted Larsen

The Cards felt good enough about these two players to release team captain Lyle Sendlein. Larsen showed he could handle the job in the preseason last year when Sendlein was hurt. But Shipley is a player the Cards triied to obtain for three offseasons and finally did, signing him to a two-year deal. He has the lead right now, as he enters camp on first team, but it will be a battle.

Battle for TE2: Darren Fells, Troy Niklas

It was believed these two players, who were the only two tight ends on the roster with any game experience in the league before the team added Jermaine Gresham, would be the two starters. Gresham changed that. As both Fells and Niklas are more or less the same player, this will be fun to watch.

Battle for QB3: Logan Thomas, Chandler Harnish, Phillip Sims

As much as the third quarterback on the roster can have, this is sort of a big deal. Thomas was drafted to perhaps be molded into the future starter. If he can't even make the roster as the backup to the backup in Year 2, it will be disappointing. At the same time, all three are battling to even make the roster. It is quite possible the Cards only keep two on the 53-man roster and add a third to the practice squad.

Battle for WR2: Michael Floyd, John Brown

This battle is a little understated, but the way people talk about John Brown, you might think about this. With two-WR sets, it has always been Larry Fitzgerald and Michael Floyd. While the Cards do run plenty of three-wide sets, is it possible Brown could jump past Floyd and be part of those two-WR formations? Floyd has the edge in one thing for those bigger formations -- he is a fierce blocker. But will the speedy Brown make it hard to get him off the field?

Battle for starting RT: Bobby Massie, D.J. Humphries

Humphries was drafted in the first round. He was brought in to play. However, the team already has a right tackle it is pleased enough with. Massie has the job and will have to lose it or Humphries will have to take it from him, but many will have eyes on the rookie and might be willing to call him a disappointment if can't play Year 1.