1. Tackle
   Center
2. Guard
   Tight end

Typically, the center is the vocal leader of the offensive line. They will call out defensive fronts and even audibles occasionally.

1. Down marking referee
   Monitor crew
2. Chain crew
   Posts crew

Measuring a first down correctly can be vital to a game, and referees try to be as accurate as possible. In one game between the Cowboys and the Raiders in 2017, a referee even brought out a piece of paper to ensure the first down was correct.

1. The end zone
   The goal
2. The scoring square
   The basket

Emmitt Smith played running back for the Dallas Cowboys for most of his career, winning three Super Bowls. He also crossed the goal line more than any other running back in NFL history.

1. End zone beams​
   Fork posts
2. Goal nets
   Goalposts

The longest made field goal in NFL history went 64 yards. It was kicked by Matt Prater in 2013 while playing for the Denver Broncos.

1. Down marks
   Court marks
2. Hashmarks
   Field marks

Traditionally, Tom Brady of the New England Patriots has been a methodical quarterback, moving the football a few yards at a time. However, he's also capable of the big play if defenses give it to him.

1. Wall
   Arc
2. Bowl
   Pocket

The best quarterbacks can move around in the pocket without scrambling to the outside and still complete a pass. Peyton Manning was a master of this, which helped him have success considering he wasn't the fastest player on the field.

1. Sidelines
   Outbox
2. Stands
   Lockerroom

The sidelines are filled with team and NFL personnel. This includes medical staff who are responsible for watching out for injured players, which has become a major concern over the years because of concussions.

1. Jordans
   Cleats
2. Sneakers
   Boots

The NFL's cleats policy was once more strict than it is today. However, in 2016, the rules were changed to allow a more open policy where players could wear custom-designed cleats.

1. Touchdown
   Goal
2. Hole
   Gain

Peyton Manning played for both the Colts and the Broncos, winning a Super Bowl with both teams. During his time between the two franchises, Manning threw 539 touchdowns, more than any other quarterback.

1. Additional point
   Extra point
2. Added point
   Scored point

In 2015, the NFL moved the extra point to the 15-yard​ line. The move has significantly increased the number of missed extra points across the league.

1. Backslide​
   Loss of down
2. Returned points
   Safety​

Super Bowl XLVIII pitted the Denver Broncos against the Seattle Seahawks. On the first play from scrimmage, the ball was snapped over Peyton Manning's head and went into the end zone, giving the Seahawks an immediate two-point advantage.

1. Takedown​
   Return
2. Interception
   Steal

Near the end of Super Bowl XLIX, the Seahawks were about to take the lead when a pass play was called inside the five-yard line. The ball was intercepted by the Patriots on what is considered one of the worst calls in Super Bowl history.

1. Drop
   Fumble
2. Mishandle
   Broken play

Adrian Peterson will go down as one of the greatest running backs in NFL history when he decides to retire. However, early in his career, Peterson had a fumbling problem that many critics attacked him for. Luckily, he worked hard to fix the problem.

1. Slot
   End
2. Wideout
   Corner

Julio Jones, wide receiver for the Falcons, has proven to be one of the best outside threats at wide receiver. He is capable of not only getting down the field but also of using his large body to jump over defenders.

1. Goal line
   Fieldline​
2. Scoreline​
   Redline

Super Bowl XXXIV between the Rams and the Titans was one for the ages. The game came down to the last play where Kevin Dyson, a receiver for the Titans, was tackled one yard short of the goal line, giving the victory to the Rams.

1. Tipoff
   Faceoff
2. Throwoff
   Kickoff

Dante Hall was one of the greatest return men to ever grace the league. He scored six kickoff return touchdowns and earned the nickname "The Human Joystick."

1. Swap
   Kick forward
2. Change up
   Punt

The longest punt in NFL history was kicked by Steve O'Neal of the New York Jets. The punt went 98 yards, though it did require some rolling to get there.

1. Defensive zone
   Offensive zone
2. Red zone
   Scoring square

To start the 2018 season, the Baltimore Ravens scored 12 straight times inside the red zone. It's the first time a team has done that in the history of the league.

1. Touchback
   Out of bounds
2. Down spot
   Automatic spot

Concussions have become a huge problem in the NFL. To help avoid them, the NFL moved the touchback mark to the 25-yard line to encourage return men to take a knee instead of returning the ball.

1. Slant
   Screen
2. Curl
   Out

Le'Veon Bell is one of the best pass-catching running backs in the NFL. However, since the Steelers refused to sign Bell to a long-term deal, the running back has decided to sit out part of the 2018 season in protest.

1. Dive
   Charge
2. Sweep
   Draw

Darren Sproles, who plays for the Eagles, is one of the fastest running backs in the league. He has a unique ability to get to the outside and turn it up, leaving defenders in the dust.

1. Curl
   Slant
2. In
   Dig

Jerry Rice is widely regarded as the best wide receiver to ever play the game. During his career, Rice set the NFL record for receptions, hauling in 1,549 balls.

1. Singleback
   Heavy set
2. Wildcat
   Shotgun

The shotgun formation was once saved for late downs when passing was required. The game has since changed, and the formation is used more widely around the league in a multitude of scenarios and on all downs.

1. Zone
   Man-to-man
2. Tight
   Single

Darrelle Revis was an excellent man-to-man corner in the NFL. He even had an entire side of the field named "Revis Island" because no one could catch a ball against him.

1. Post
   Out
2. Slant
   In

Randy Moss was a deep threat receiver whose speed took the league by storm. He had the ability to lure defenders to sleep before exploding down the field for a touchdown catch.

1. Trips
   I-formation
2. Singleback
   Wildcat

Though they weren't the first to use it, the Miami Dolphins popularized the wildcat formation in the NFL. The team employed the formation with running backs Ronnie Brown and Ricky Williams with great success early on.

1. Cover
   Spy
2. Hawk
   Hunter

Running quarterbacks have always been around, but not to the extent that they are today. The zone read is one of the most popular plays to usher in the era of the running quarterback.

1. Play action
   Wait and run
2. Draw
   Dig

The draw play is often used on third and long when there isn't much of a chance of throwing for the first down. This minimizes a team's chance of turning the ball over on an interception.

1. Huddle
   Circle
2. Group
   Unit

The no-huddle offense became popular in the late '80s and early '90s when the Buffalo Bills started using it throughout the entirety of a game. The offense helped lead the team to four straight Super Bowls.

1. Late foul
   Dead-ball foul
2. Stoppage foul
   Entrance foul

In 1976, the Seahawks and the Buccaneers played each other in one of the most penalized games in NFL history. The game consisted of 39 flags for 310 yards.

1. Halting
   Delay of game
2. Stoppage of progress
   Holding

For right-handed quarterbacks, the left tackle is usually the most valuable position on the offensive line. They are responsible for protecting the quarterback's blind side from incoming defenders.

1. Early hit
   Line break
2. Encroachment
   Pre-snap failure

Some defenders try to get a jump on the ball to gain an advantage against the offense. Quarterbacks will use a hard count to check defenders and keep this from happening.

1. Side toss
   Late throw
2. Intentional grounding
   Lost receiver

Intentional grounding can result in several scenarios. It is an automatic loss of down and can also result in a ten-yard​ loss, a spot foul or a safety.

1. Split
   Dive
2. Power
   Forward

Marshawn Lynch is a physical specimen at the running back position. When he comes running up the middle, defenders have to make a career decision on if they want to tackle him.

1. Halt
   Break
2. Stoppage
   Spike

To win a game against the Jets in 1994, Dan Marino famously faked a spike and threw a touchdown pass to win the game for the Dolphins. The game has become known as the "Fake Spike Game."