With so many sports statistics available online these days, it's not uncommon to see an abbreviation you don't recognize. One such statistic in football is PRK, sometimes abbreviated as RK, which can mean player rank or position rank. This statistic is very significant, because it can tell you a lot about a player in relation to the rest of the league.
PRK can tell you how a particular player is performing against the other players in the league. This ranking is usually based around one key statistic; for example, a quarterback's PRK might be based on quarterback rating, whereas a running back's PRK is usually based on rushing yards. Most websites will allow you to filter by a specific stat so the PRK will be based on the stat you want to analyze.
The more useful purpose of PRK is to break down which players are the best at their respective positions. Some sites use an overall rank to show which players are the league's best, then a position rank to indicate the top performers at that position. This is especially useful if you're looking at a list of an entire player pool, but just want to see who the elite players are at a specific position.
The main use of PRK is in fantasy football, where players must draft and sign real-life players for their fantasy teams. Usually, the player selections are done from a main screen that shows all of the available players to select. PRK can help players to find the best players at the position they want to fill. Because different positions have different levels of value in fantasy football, this stat is essential to having a winning team.
While PRK tends to be a fantasy-centric stat, it does have its purpose in other types of football, such as non-fantasy pro football. For instance, PRK can tell you if your team's star receiver is one of the league's best. PRK can also help you to see a player's contributions outside of his usual skill area, such as a quarterback's rushing yards or a running back's receiving statistics.