With the NFL regular season set to begin in a few days, we are going to have to get accustomed to predictions, previews and analysis of all 32 teams around the league.

While worthless, these predictions can bring a certain level of entertainment as we all prepare for what promises to be another exciting season.

We continue with the top-five tight end groups in the NFL...

1. Philadelphia Eagles: Brent Celek, James Casey and Zach Ertz 

Philadelphia released Clay Harbor over the weekend, but its top-three tight ends seem to have what it takes to form the best unit in the entire National Football League. 

Brent Celek has put up over 600 receiving yards in three of the last four seasons and is etched in stone as Philadelphia's starting tight end as Week 1 approaches. With that said, new head coach Chip Kelly will be running multiple tight end sets this year, especially with Jeremy Maclin out for the season with a torn ACL. James Casey is more of a hybrid player at this point, but he'll line up at tight end a majority of the time. Casey put up 34 catches for 330 yards and a few scores for the Houston Texans last season. He's a major blocking threat in the running game as well. 

Philadelphia spent a second-round pick on former Stanford tight end Zach Ertz, who is projected to be the starter down the road. Ertz put up nearly 900 yards and six scores for the Cardinal last season. 

2. San Francisco 49ers: Vernon Davis, Vance McDonald, Garrett Celek and Demarcus Dobbs 

It goes without saying that Vernon Davis is one of the best all-around tight ends in the entire NFL. His impact will be two-fold this season with Michael Crabtree lost until at least November with an Achilles injury. When targeted, Davis represents a major mismatch against safeties and linebacker. There is no reason to expect struggles from the fomer Pro Bowl performer. Look for 1,000-plus yards and double-digit scores. 

When San Francisco lost Delanie Walker to the Tennessee Titans in free agency, there was a major concern that it would be lacking depth at tight end. Those questions were answered when Trent Baalke and Co. exhausted a second-round pick in April's draft on former Rice standout Vance McDonald. The 6'4", 267-pound pass catcher proved himself to be quite the threat during the preseason and will be a great complement to Davis at tight end. Garrett Celek provides depth behind the two. 

3. Cincinnati Bengals: Jermaine Gresham, Tyler Eifert, Orson Charles and Alex Smith

When you spend a first-round pick on tight ends twice in a four-year span, you better have a ton of talent at that position on your roster. Jermaine Gresham has seen receptions and yardage numbers increase each of his first three seasons, topping out at 64 for 737 last season. This didn't stop Cincinnati from picking up Tyler Eifert in the first round of April's draft. 

At 6'6" and 250 pounds, the Notre Dame product is a mismatch waiting to happen between the hashes and down the field. His size and athleticism make it nearly impossible for opposing linebackers and safeties to cover him one on one. Match him with Gresham and you have a great one-two punch for Andy Dalton in the passing game. Orson Charles will act as somewhat of a hybrid this season, taking snaps out of the backfield at times. This is important, because it will get these three tight ends on the field at the same time. Alex Smith is more of the blocking type, but can catch a pass or two. 

4. New England Patriots: Rob Gronkowski, Zach Sudfeld, and Michael Hoomanawanui 

Even without the services of Aaron Hernandez, who is awaiting trial on murder charges, the Patriots have the best tight end in the game in the form of Rob Gronkowski. The 23-year-old pass catcher avoided the PUP list and should be active early in the season, which is going to be huge for New England. When healthy, he creates a huge window for Tom Brady to throw to and is the most productive tight end in the league. "Gronk" has put up over 2,300 yards and 28 scores since the start of the 2011 season. That equates to 86 yards and one score per outing. 

Zach Sudfeld, an undrafted free agent from Nevada has been beyond impressive during camp and figures to start the season as New England's best pass-catching tight end until Gronkowski returns from injury. The youngster put up nearly 600 yards and eight scores last year. 

5 (T): Indianapolis Colts: Dwayne Allen, Coby Fleener, Justice Cunningham

Indianapolis made the decision back in 2012 to get young quarterback Andrew Luck a couple tight end options in the draft. The selections of Dwayne Allen and Coby Fleener that April may have been in response to the success that the Patriots had with Rob Gronkowski and Aaron Hernandez the season prior. 

Unfortunately for Indianapolis, Fleener (second-round pick) struggled through his rookie campaign. The Stanford product caught just 26 passes for 281 yards and a couple scores. Not exactly what general manager Ryan Grigson and Co. were looking for. Meanwhile, Allen had a productive first season. He caught 45 passes for 521 yards and three scores. Combined, the two weren't that bad. 

Expect bigger things in 2013. Outside of having a season of experience under their belts, these two tight ends will be performing under new offensive coordinator Pep Hamilton, who ran Stanford's offense the past couple seasons. As most of you already know, Hamilton's scheme utilizes tight ends much more than what we saw under Bruce Arians last year.