 Since 2010, every regular season ends with only divisional match-ups in the final week, in an attempt to discourage playoff-bound teams from resting their starters and playing their reserves.Prior to (when the league expanded to 32 teams) the league used similar scheduling rubrics, though they were adjusted for the number of teams and divisions.From 1970 to 1994, and again from 1999 to 2001, the league did not have equal numbers of teams in every division, so not every team's opposition could be determined by the same means.