{
 "meta": {
  "first_roster_season": 1999,
  "cohort_first": 2000,
  "cohort_last": 2012,
  "last_season": 2025,
  "seasons_to_finish": 13,
  "finished_by": 2024
 },
 "cohort_players": 4921,
 "players": 4889,
 "still_active": 32,
 "with_gaps": 1530,
 "mean": 4.4,
 "median": 3,
 "max": 22,
 "share_1": 23.7,
 "share_2plus": 76.3,
 "share_3plus": 61.4,
 "share_5plus": 41.0,
 "share_10plus": 8.8,
 "share_11plus": 5.6,
 "ten_given_five_pct": 22,
 "over_15": 21,
 "dist": {
  "1": 1159,
  "2": 727,
  "3": 575,
  "4": 424,
  "5": 412,
  "6": 333,
  "7": 355,
  "8": 272,
  "9": 201,
  "10": 155,
  "11": 113,
  "12": 69,
  "13": 41,
  "14": 20,
  "15": 12,
  "16": 10,
  "17": 5,
  "18": 4,
  "20": 1,
  "22": 1
 },
 "by_pos": [
  {
   "pos": "LS",
   "players": 44,
   "mean": 8.6,
   "median": 8.0
  },
  {
   "pos": "K",
   "players": 50,
   "mean": 7.6,
   "median": 8.0
  },
  {
   "pos": "P",
   "players": 58,
   "mean": 6.4,
   "median": 5.5
  },
  {
   "pos": "QB",
   "players": 210,
   "mean": 5.3,
   "median": 4.0
  },
  {
   "pos": "OL",
   "players": 774,
   "mean": 4.6,
   "median": 4.0
  },
  {
   "pos": "DL",
   "players": 699,
   "mean": 4.6,
   "median": 4
  },
  {
   "pos": "LB",
   "players": 675,
   "mean": 4.5,
   "median": 4
  },
  {
   "pos": "TE",
   "players": 308,
   "mean": 4.2,
   "median": 3.0
  },
  {
   "pos": "DB",
   "players": 928,
   "mean": 4.2,
   "median": 3.0
  },
  {
   "pos": "FB",
   "players": 108,
   "mean": 4.2,
   "median": 4.0
  },
  {
   "pos": "WR",
   "players": 611,
   "mean": 3.8,
   "median": 3
  },
  {
   "pos": "RB",
   "players": 414,
   "mean": 3.6,
   "median": 3.0
  }
 ],
 "by_debut": [
  {
   "year": 2000,
   "players": 462,
   "mean": 4.36
  },
  {
   "year": 2001,
   "players": 399,
   "mean": 4.61
  },
  {
   "year": 2002,
   "players": 381,
   "mean": 4.3
  },
  {
   "year": 2003,
   "players": 366,
   "mean": 4.78
  },
  {
   "year": 2004,
   "players": 367,
   "mean": 4.62
  },
  {
   "year": 2005,
   "players": 362,
   "mean": 4.43
  },
  {
   "year": 2006,
   "players": 376,
   "mean": 4.64
  },
  {
   "year": 2007,
   "players": 354,
   "mean": 4.41
  },
  {
   "year": 2008,
   "players": 322,
   "mean": 4.47
  },
  {
   "year": 2009,
   "players": 364,
   "mean": 4.19
  },
  {
   "year": 2010,
   "players": 380,
   "mean": 4.38
  },
  {
   "year": 2011,
   "players": 369,
   "mean": 3.98
  },
  {
   "year": 2012,
   "players": 387,
   "mean": 4.13
  }
 ],
 "debut_min": 3.98,
 "debut_max": 4.78,
 "debut_first_mean": 4.36,
 "debut_last_mean": 4.13,
 "pos": {
  "LS": {
   "players": 44,
   "mean": 8.6,
   "median": 8.0
  },
  "K": {
   "players": 50,
   "mean": 7.6,
   "median": 8.0
  },
  "P": {
   "players": 58,
   "mean": 6.4,
   "median": 5.5
  },
  "QB": {
   "players": 210,
   "mean": 5.3,
   "median": 4.0
  },
  "OL": {
   "players": 774,
   "mean": 4.6,
   "median": 4.0
  },
  "DL": {
   "players": 699,
   "mean": 4.6,
   "median": 4
  },
  "LB": {
   "players": 675,
   "mean": 4.5,
   "median": 4
  },
  "TE": {
   "players": 308,
   "mean": 4.2,
   "median": 3.0
  },
  "DB": {
   "players": 928,
   "mean": 4.2,
   "median": 3.0
  },
  "FB": {
   "players": 108,
   "mean": 4.2,
   "median": 4.0
  },
  "WR": {
   "players": 611,
   "mean": 3.8,
   "median": 3
  },
  "RB": {
   "players": 414,
   "mean": 3.6,
   "median": 3.0
  }
 },
 "spec_names": [
  "LS",
  "K",
  "P"
 ],
 "best_other": {
  "pos": "QB",
  "mean": 5.3
 },
 "worst_other": [
  {
   "pos": "RB",
   "mean": 3.6
  },
  {
   "pos": "WR",
   "mean": 3.8
  }
 ],
 "ten_text": "Reaching ten seasons is rarer in every group, and it is most common among kickers (40.0 percent), long snappers (38.6 percent) and punters (25.9 percent).",
 "five_text": "Measured by the share of players who reached five seasons, the highest groups are long snappers (86.4 percent), kickers (64.0 percent), punters (55.2 percent), and the lowest are wide receivers (31.3 percent), running backs (32.6 percent).",
 "debut_text": "The 2003 class had the longest average career, 4.78 seasons, and the 2011 class the shortest, 3.98.",
 "class_text": "The classes are not the same size: the 2000 class has 462 players in the group and the 2008 class has 322, so the class averages are built on groups of different sizes.",
 "gaps_pct": 31.3,
 "draft": [
  {
   "label": "Round 1",
   "players": 425,
   "mean": 7.33,
   "median": 7,
   "five": 77.9
  },
  {
   "label": "Round 2",
   "players": 405,
   "mean": 6.14,
   "median": 6,
   "five": 68.6
  },
  {
   "label": "Round 3",
   "players": 420,
   "mean": 5.34,
   "median": 5.0,
   "five": 52.9
  },
  {
   "label": "Round 4",
   "players": 445,
   "mean": 4.98,
   "median": 4,
   "five": 47.2
  },
  {
   "label": "Round 5",
   "players": 390,
   "mean": 4.56,
   "median": 4.0,
   "five": 43.6
  },
  {
   "label": "Round 6",
   "players": 394,
   "mean": 4.28,
   "median": 3.0,
   "five": 38.6
  },
  {
   "label": "Round 7",
   "players": 464,
   "mean": 3.78,
   "median": 3.0,
   "five": 31.5
  },
  {
   "label": "Undrafted or no draft record",
   "players": 1940,
   "mean": 3.22,
   "median": 2.0,
   "five": 25.5
  }
 ],
 "draft_text": "First-round picks lasted 7.3 seasons on average, against 3.2 for the players who were not drafted, and 77.9 percent of them reached five seasons, compared with 25.5 percent of the undrafted group.",
 "draft_shape": "The table shows a step down from round to round rather than a single cliff, and the largest group is undrafted or no draft record, with 1,940 of the 4,889 players.",
 "other_text": "quarterbacks average 5.3 seasons, while running backs average 3.6 and wide receivers 3.8.",
 "worst_text": "Running backs, with 3.6 seasons on average, and wide receivers, with 3.8."
}