2016 All-Ireland Senior Football Championship
The 2016 All-Ireland Senior Football Championship was the 129th edition of the GAA's premier inter-county gaelic football tournament since its establishment in 1887. 33 teams took part. 31 of the 32 Counties of Ireland participated, with Kilkenny, as in previous years, declining to take part. London and New York again competed. The winning team, Dublin (who defeated Mayo by a single point after a replay), received the Sam Maguire Cup. It was the first time Dublin, as defending champions, had retained the trophy since the 1977 final. Format. Provincial Championships format . Connacht, Leinster, Munster and Ulster each organise a provincial championship. All provincial matches are knock-out. All teams eliminated from their provincial championships with the exception of New York, for logistical reasons, enter the All-Ireland qualifiers. Qualifiers format. Twenty eight of the twenty nine teams beaten in the provincial championships enter the All-Ireland qualifiers, which are knockout. The sixteen teams eliminated before their provincial semi-finals play eight matches in round 1, with the winners of these games playing the eight beaten provincial semi-finalists in round 2. The eight winning teams from round 2 play-off against  each other in round 3, with the four winning teams facing the four beaten provincial finalists in round 4 to complete the double-elimination format. Further details of the format are included with each qualifier round listed below. All-Ireland format. The four provincial champions play the four winners of round 4 of the qualifiers in the quarter-finals. Two semi-finals and a final follow. All matches are knock-out. Any game that ends in a draw is replayed. If a replay ends in a draw, extra time is played. Changes from 2015 championship. Referees have been instructed to  add on 20 seconds for the introduction of a substitute and 20 seconds for each instance of a goalkeeper or defender going upfield for a placed ball attempt. Previously there was no specific provision for these two events which led to instances of deliberate time-wasting by teams who were leading. 30 seconds are also to be added each time Hawk-Eye is utilised. Broadcast rights. RTÉ, the national broadcaster in Ireland, provided the majority of the live television coverage of the championship in the third year of a deal running from 2014 until 2016. A number of matches were  also broadcast by Sky Sports, with Sky having exclusive rights to some games. Live broadcast matches. The broadcast schedule for matches shown live on television in Ireland follows - All-Ireland Qualifiers. A and B Teams. An A and B system for the qualifier draws was introduced in 2014 and has been retained. The teams are designated as A or B depending on which half of their provincial championships they play in. Although some teams receive byes in the early provincial rounds, their position in the round in which they enter the competition is usually determined by the provincial draw, resulting  in most teams being designated as A or B randomly. For example, each of the four provinces has two semi-finals – one between two teams designated A and one between two teams designated B. The beaten semi-finalists in each province will always be one A team and one B team. In all qualifier rounds A teams play A teams and B teams play B teams. Usually the A teams play their provincial games before the B teams which allows the A qualifier games to be scheduled a week before the B qualifier games. Round 1. In the first round  of the qualifiers sixteen of the seventeen teams beaten in the preliminary rounds or quarter-finals of the provincial championships compete. New York does not enter the qualifiers. Four A teams play four A teams and four B teams play four B teams. The round 1 draw is unrestricted − if two teams have played each other in a provincial match they can be drawn to meet again with the winner of the provincial match receiving home advantage. The eight round 1 winners play the eight beaten provincial semi-finalists in round 2 of the qualifiers. The following teams were  entered into round 1. Carlow Waterford Armagh <nowiki>*</nowiki> Round 2. In the second round of the qualifiers the eight winning teams from Round 1A and Round 1B play the eight beaten provincial semi-finalists. The round 2 draw is unrestricted − if two teams have played each other in a provincial match they can be drawn to meet again with the winner of the provincial match receiving home advantage. The eight winners of these matches play each other in Round 3. The following teams take part in this round - Cavan Fermanagh Cork Round 3. In the third round  of the qualifiers winning teams from round 2A play against winning teams from round 2A and winning teams from round 2B play against winning teams from round 2B. Round 3 rules do not allow two teams that have played each other in a provincial match to meet again. The four winners of these matches play the four beaten provincial finalists in Round 4. The following teams take part in this round - Cork Round 4. In the fourth round of the qualifiers, the four winning teams of Round 3A and Round 3B play the four beaten provincial finalists. Round 4 rules  do not allow two teams that have played each other in a provincial match to meet again if such a pairing can be avoided. The four winners of these matches play the provincial champions in the All-Ireland Quarter-Finals. The following teams take part in this round - Roscommon Cork Donegal All-Ireland. All-Ireland Quarter-Finals. The four provincial champions play the winners from Round 4 of the qualifiers. Draw rules – 1) Two teams who met in a provincial final cannot meet again 2) If one of the provincial champions has already met one of the qualifiers in  an earlier match then those two teams cannot be drawn together if such a pairing can be avoided. All-Ireland Semi-Finals. There is no draw for the semi-finals as the fixtures are pre-determined on a three yearly rotation. This rotation ensures that a provinces's champions play the champions of all the other provinces once every three years in the semi-finals if they each win their quarter-finals and prevents two provincial champions meeting in the semi-finals in successive years. If a qualifier team beats a provincial winner in a quarter-final, the qualifier  team takes that provincial winner's place in the semi-final. Championship statistics. Scoring Events. Widest winning margin: 19 Most goals in a match: 7 Most points in a match: 41 Most goals by one team in a match: 5 Highest aggregate score: 56 points Lowest aggregate score: 17 points "The Sunday Game" team of the year was picked on 1 October, the night of the final replay. Dublin's Brian Fenton was named as the Sunday Game player of the year. The "All Star" football team was announced on 3 November.