What does ydsg mean in football

If a defensive player causes the fumble, this results in a touchback for the defense. If the offense causes the fumble, the play is a safety, giving the defense two points.

A fumble can force a touchback if the offense fumbles it forward and rolls out of bounds afterward. A ball must be called dead either in the end zone or past it. However, until the officials declare the ball dead, there are several things both the offense and the defense can do to negate the touchback.

This means that the next drive will begin at the spot of the ball down by contact. If a reciever re-enters the end zone after crossing the goal line, they commit a safety penalty. However, the National Football League amended these rules in an attempt to avoid dangerous collisions. The idea behind the touchback is to do two things. First, you want to create a safe environment for the receiver. For example, allowing a touchback on a catch in the end zone stops the defensive team from crashing into them.

Second, teams might want to preserve as much time on the clock as possible to win a game. What is an Onside Kick? What is a Pick 6 in Football? NFL Coach Challenge.

Intentional Grounding. Roughing the Kicker. From the time the ball is snapped put into play , to the time the play is whistled over by the officials , is considered one down. A team's offense is given four downs plays to move ten yards toward the opponent's end zone.

Distance is the number of yards a team needs to get a new set of four downs. If they make the ten yards needed within four downs, they are given a new set of downs. This is called getting a first down. If they don't make it the required ten yards, the other team's offense takes possession of the ball.

The first play of a series is called first-and-ten because it is the first down and ten yards are needed to receive a new set of four downs. Suppose on the first play, the team on offense picks up three yards. The next play would then be second-and-seven because it is the second play of the set and they still need seven yards to get the first down.

If they were to pick up six yards on the second play it would leave them one yard shy of the first down marker, therefore setting up a third-and-one situation. Third-and-one because it would be the third play of the series and they would still need one yard to get a first down.

If the team with the ball can pick up one yard or more on the third-down play, then they will be given a first down, which means they get to start all over with a new set of four downs. A team can continue moving the football down the field as long as they continue to pick up first downs.

If a team fails to gain the required yardage on third down, several things could happen on fourth down:. Rec - receptions. RH position - right halfback. RS position - right safety. SE position - split end. Sk - in a passing table present , this refers to times sacked.

In a defensive table, it refers to the number of sacks a player or team made. For individuals, sacks have only been an official stat since SoS - Strength of Schedule indicates the combined winning percentages of the opponents this team played in a given year. Higher SoS indicates a tougher schedule, lower indicates easier. Targets - pass targets, as given in the play-by-play account of the game.

Note that pass locations are defined as long 15 or more yards or short less than 15 yards. TB position - tailback in the single wing. TD - touchdowns. Tkl - tackles. We have tackle data for all players who were active in or later. Prior to , the tackle data is unofficial, inconsistently recorded from team to team, and incomplete in our database.

Also, before , some teams recorded assists while others didn't, so we have lumped tackles plus assists together in the tackles column for those years. From to present, tackles remain an unofficial stat, but are recorded consistently and should be complete in our database. VBD - the player's fantasy value for the season. VBD stands for Value-Based Drafting, but the initials have come to stand for the result of the method i.

The method was popularized by Joe Bryant of footballguys. Essentially, the idea is this: the value of a player is the difference between his fantasy points and a baseline, with the baseline being defined as the number of fantasy points that a relatively cheap replacement would get.

I won't go into detail on why I chose these numbers, but if you are a fantasy footballer, you probably have some idea. Anyway, here's an example. In , O. Simpson had fantasy points.

The 24 ranked running back that year was John Brockington who had fantasy points. Thus, O. But wait, there's just one more thing. NOTE: any player who is below the baseline will be counted as having zero value.

WB position - wingback in the single wing. XPA - extra points attempted. XPM - extra points made. Yds - yards. YScm - yards from scrimmage. That is, rushing yards plus receiving yards. Explanation of the Advanced Passing table This is a quick look at how a quarterback did compared to league average in eight different passing stats: yards per attempt , adjusted yards per attempt , net yards per attempt , adjusted net yards per attempt , completion percentage , passing TD percentage , interception percentage , and sack percentage.

First, for each stat for each year for each league, we computed two things: the league average for that stat in that league during the three-year period with the given year in the middle. For example, the "league average" for the AFL would be the aggregate average of the stats accumulated in the AFL from to Next, we computed how many standard deviations away from the league average each player was in each of his seasons.

We multiply that number by 15 and add it to , and that is the number you see. Bottom line: On all stats, is league average. On all stats including sack percentage and interception percentage , a higher number means better than average The greatest passing seasons of all time are in the s.

A typical league-leading season in most categories will be in the high s or the low-to-mid s. Fine print: Only seasons in which the player attempted 50 or more passes are included in the Advanced Passing table The career score at the bottom is an attempt-weighted average of the numbers in the column.

For these stats, the totals at the bottom include only the seasons for which the yearly score is not blank, so in some cases they might not be representative of the player's entire career. Explanation of the similarity scores At baseball-reference. These lists are generated by a method introduced by Bill James in the s, and his aim was to find players who were similar in quality, but also similar in style of play.

The similar players lists here at pro-football-reference are NOT the same thing.