Tannehill blossoming but…
With the signings of free agents Mike Wallace, Dannell Ellerbe, Phillip Wheeler, Tyson Clabo, Brent Grimes and Brandon Gibson, the Dolphins have had an eventful offseason. But the biggest news has been the development of second-year quarterback Ryan Tannehill, who reportedly has been sharp in practices and who looks ‘more instinctive and less mechanical.’ With the Bills and Jets devoid of overall talent and the Patriots in the midst of a tumultuous offseason (that’s putting it mildly), some believe the Dolphins could be a sleeper in the AFC East. That said, the reports on left tackle Jonathan Martin have been less than favorable. Martin has been schooled by up-and-comer Olivier Vernon in practice and continues to be suspect in pass protection. And while Martin has looked good as a run-blocker, there are questions about whether Clabo can make the transition from a standard to a zone-blocking scheme. Even if Tannehill takes a significant step in his development and is surrounded by more talent (Lamar Miller continues to showcase his skills in camp), it won’t matter if the offensive line struggles. The play of Miami’s offensive tackles will be a topic of discussion throughout preseason and heading into Week 1.

Kolb has already been sacked.
The preseason hasn’t even started and already Kevin Kolb is on his backside. Bills coach Doug Marrone said the quarterback “tweaked” his knee and is considered day to day after tripping on a wet mat Saturday morning. The news comes on the heels of reports that Kolb has been outplayed in practice by rookie E.J. Manuel, who might wind up starting Week 1 despite his rawness at the position. Manuel fits Marrone’s up-tempo, run-first approach, so the first-year quarterback could grow on the job without having the pressure or expectations of carrying the offense with his arm. But it’s an indictment against Kolb that he can’t even stay on his own two feet while competing for a starting job in training camp. Granted, he was just keeping the seat warm until Manuel was ready to start, but if Kolb can’t win the starting job in Buffalo then what head coach or GM in his right mind will ever view Kolb as a starter again? It’s amazing to think he was once handpicked by Andy Reid to be the successor to Donovan McNabb.

49ers add Collie and Hawkins: What does it say about Jenkins?
The recent additions of Austin Collie and Lavelle Hawkins speak volumes about the development or lack thereof of 49ers’ 2012 first-round pick A.J. Jenkins. The former Illinois standout reported to camp out of shape last year, was eased into the offense by head coach John Harbaugh and OC Greg Roman, and then logged just 47 snaps in the regular season as a rookie. He’s reportedly off to a slow start again this summer and is now dealing with a hamstring strain. And while the additions of Collie and Hawkins could be precautionary with Michael Crabtree (Achilles’ tear) out and Kyle Williams returning from ACL surgery, it’s worth noting that Jenkins has failed to distinguish himself with the position opposite Anquan Boldin up for grabs.

It took Pro Bowlers Roddy White and Vincent Jackson three years to make an impact in the NFL, so the Niners will remain patient with Jenkins. But with Crabtree down, the team has to be frustrated that it hasn’t received more from its first-round investment up to this point.

Cook could be ready for a breakout campaign.
Titans fans are well aware of tight end Jared Cook’s upside and potential. For years they had to endure preseason chatter about how Cook was going to develop into a major contributor in Tennessee’s passing game, only to be disappointed by his lack of production. Whether it was poor playcalling or game planning, quarterback struggles, or Cook’s own bouts with inconsistency, the former South Carolina tight end has failed to deliver.

But after signing a lucrative free agent deal this offseason, Cook has turned heads in Rams camp. He and Sam Bradford have built a solid rapport and Cook has demonstrated his immense versatility. On one play he’s lining up in-line and the next he’s in the slot or out wide and in motion. He’s allowed the Rams to practice formations that they couldn’t use a year ago because they simply didn’t have a weapon as skilled as Cook. Whether it’s against a veteran defensive back or rookie safety TJ McDonald, Cook continues to beat defenders with his speed, soft hands, and big catch radius. The success of St. Louis’ offense will depend on Brian Schottenherim’s creativity, as well as Bradford’s ability to work through his progressions quickly and get the ball out of his hands on time and accurately. But with weapons like Cook, Tavon Austin and Chris Givens, the Rams have finally equipped Bradford with the tools necessarily to succeed.

An offensive weapon is developing in Cleveland.
The reports out of Cleveland have been inconsistent on receiver Josh Gordon. While new GM Mike Lombardi says Gordon has had a “great attitude” this offseason, others have written about his immaturity and lackadaisical habits at practice. He’s also facing a three-game suspension at the start of the season and is now battling “patellar tendonitis.” With second-year quarterback Brandon Weeden also drawing mixed reviews from pundits, the one consistent positive for Cleveland has been tight end Jordan Cameron. The Cleveland Plain Dealer reports that Cameron has been targeted “early and often” during training camp, and he might emerge as Weeden’s security blanket this season. While the Browns’ success this season will depend on Ray Horton’s underrated defense and the development of Weeden, it’s good to hear that Cameron is turning heads. Cleveland has long searched for offensive weapons.