Суть в заголовке. Верхнюю таблицу добавил временно для удобного и простого тестирования. Собствественно, если открыть этот template.html как файл то сортировка работает, при запуске сервера и переходе на URL этого шаблона никаких признаков работающей сортировки нет. Есть предположения? Код шаблона в спойлере. Если нужно что-то еще из файловой структуры Django выложить, то говорите.
Документация на sorter -
https://mottie.github.io/tablesorter/docs/
Код
{% extends 'base.html' %}
{% load static %}
{% block content %}
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://mottie.github.io/tablesorter/css/theme.default.css">
<script src="https://mottie.github.io/tablesorter/js/jquery.tablesorter.js"></script>
<script type="text/javascript">
$(function() {
$("#tab2").tablesorter();
});
</script>
</head>
<body>
<form action="/search/" method="get">
<input type="text" name="q">
<input type="submit" value="Search">
</form>
<table id="tab2" class="table table-hover table-bordered tablesorter">
<thead>
<tr>
<th>Month</th>
<th>Savings</th>
</tr>
</thead>
<tbody>
<tr>
<td>January</td>
<td>$100</td>
</tr>
<tr>
<td>February</td>
<td>$80</td>
</tr>
</tbody>
<tr>
<td>Sum</td>
<td>$180</td>
</tr>
</table>
<div class="container">
<br>
<!-- GOALIES -->
<h4>Goalies</h4>
<table id="tab3" class="table table-hover table-bordered tablesorter">
<thead class=thead-light>
<tr>
<th>Name</th>
<th>Position</th>
<th>Team</th>
<th>Height</th>
<th>Weight</th>
<th>Born</th>
<th>Drafted</th>
<th>Year</th>
<th>Games</th>
<th>Wins</th>
<th>Losses</th>
<th>OTL</th>
<th>GAA</th>
<th>SV %</th>
<th>SV</th>
<th>SHO</th>
</tr>
</thead>
{% for goalie in goalies %}
<tbody>
<tr>
<td><a href="{% url 'player_detail' goalie.playerName|slugify goalie.playerId %}">{{ goalie.playerName }}</td>
<td>{{ goalie.playerPositionCode }}</td>
<td>{{ goalie.playerTeamsPlayedFor }}</td>
<td>{{ goalie.playerHeight }}</td>
<td>{{ goalie.playerWeight }}</td>
<td>{{ goalie.playerBirthDate }}</td>
<td>{{ goalie.playerDraftOverallPickNo }}</td>
<td>{{ goalie.playerDraftYear }}</td>
<td>{{ goalie.gamesPlayed }}</td>
<td>{{ goalie.wins }}</td>
<td>{{ goalie.losses }}</td>
<td>{{ goalie.otLosses }}</td>
<td>{{ goalie.goalsAgainstAverage|floatformat:2 }}</td>
<td>{{ goalie.savePctg|floatformat:3 }}</td>
<td>{{ goalie.saves }}</td>
<td>{{ goalie.shutouts }}</td>
{% endfor %}
</tr>
</tbody>
</table>
<br>
<!-- SKATERS -->
<h4>Skaters</h4>
<table id="tab2" class="table table-hover table-bordered tablesorter">
<thead class=thead-light>
<tr>
<th>Name</th>
<th>Position</th>
<th>Team</th>
<th>Height</th>
<th>Weight</th>
<th>Born</th>
<th>Drafted</th>
<th>Year</th>
<th>Games</th>
<th>Goals</th>
<th>Assists</th>
<th>Points</th>
<th>+/-</th>
<th>PIM</th>
<th>Shots</th>
<th>Hits</th>
<th>Blocks</th>
<th>FW</th>
<th>PPP</th>
<th>SHP</th>
<th>TOI</th>
<th>TOI PP</th>
<th>TOI SHP</th>
</tr>
</thead>
{% for player in skaters %}
<tbody>
<tr>
<td><a href="{% url 'player_detail' player.playerName|slugify player.playerId %}">{{ player.playerName }}</td>
<td>{{ player.playerPositionCode }}</td>
<td>{{ player.playerTeamsPlayedFor }}</td>
<td>{{ player.playerHeight }}</td>
<td>{{ player.playerWeight }}</td>
<td>{{ player.playerBirthDate }}</td>
<td>{{ player.playerDraftOverallPickNo }}</td>
<td>{{ player.playerDraftYear }}</td>
<td>{{ player.gamesPlayed }}</td>
<td>{{ player.goals }}</td>
<td>{{ player.assists }}</td>
<td>{{ player.points }}</td>
<td>{{ player.plusMinus }}</td>
<td>{{ player.penaltyMinutes }}</td>
<td>{{ player.shots }}</td>
<td>{{ player.hits }}</td>
<td>{{ player.blockedShots }}</td>
<td>{{ player.faceoffsWon }}</td>
<td>{{ player.ppPoints }}</td>
<td>{{ player.shPoints }}</td>
<td>{{ player.timeOnIcePerGame }}</td>
<td>{{ player.ppTimeOnIcePerGame }}</td>
<td>{{ player.shTimeOnIcePerGame }}</td>
{% endfor %}
</tr>
</tbody>
</table>
</div>
</body>
{% endblock content %}
