Complex sentence: Sam Houston State has many in-game traditions, most of which were started in the last decade, such as when both teams'bands are present, the Bearkat Marching Band drum line learns the other band's drum cadences and plays them back.
Split into simpler sentences: Sam Houston State has many in-game traditions, most of which were started in the last decade. During games where both teams'bands are present, the Bearkat Marching Band drum line learns the other band's drum cadences and plays them back.