| # | Tier | Division | G | W | D | L | GF | GA | Pts | +- | |
| 1996 | 4 | 1 | Major League Soccer Western Conference | 32 | 12 | 3 | 17 | 50 | 50 | 39 | 0 | |
| 1997 | 5 | 1 | Major League Soccer Western Conference | 32 | 9 | 3 | 20 | 55 | 59 | 30 | -4 | |
| 1998 | 5 | 1 | Major League Soccer Western Conference | 32 | 10 | 3 | 19 | 48 | 60 | 33 | -12 | |
| 1999 | 5 | 1 | Major League Soccer Western Conference | 32 | 9 | 10 | 13 | 48 | 49 | 37 | -1 | |
| 2000 | 4 | 1 | Major League Soccer Western Conference | 32 | 7 | 8 | 17 | 35 | 50 | 29 | -15 | |
| 2001 | 2 | 1 | Major League Soccer Western Conference | 26 | 13 | 6 | 7 | 47 | 29 | 45 | 18 | Champions |
| 2002 | 2 | 1 | Major League Soccer Western Conference | 28 | 14 | 3 | 11 | 45 | 35 | 45 | 10 | |
| 2003 | 1 | 1 | Major League Soccer Western Conference | 30 | 14 | 9 | 7 | 45 | 35 | 51 | 10 | Champions |
| 2004 | 4 | 1 | Major League Soccer Western Conference | 30 | 9 | 11 | 10 | 41 | 35 | 38 | 6 | |
| 2005 | 1 | 1 | Major League Soccer Western Conference | 32 | 18 | 10 | 4 | 53 | 31 | 64 | 22 | |
| - |
| 2008 | 7 | 1 | Major League Soccer Western Conference | 30 | 8 | 9 | 13 | 32 | 38 | 33 | -6 | |
| 2009 | 8 | 1 | Major League Soccer Western Conference | 30 | 7 | 9 | 14 | 36 | 50 | 30 | -14 | |
| 2010 | 5 | 1 | Major League Soccer Western Conference | 30 | 13 | 7 | 10 | 34 | 33 | 46 | 1 | |
| 2011 | 7 | 1 | Major League Soccer Western Conference | 34 | 8 | 14 | 12 | 40 | 45 | 38 | -5 | |
| 2012 | 1 | 1 | Major League Soccer Western Conference | 34 | 19 | 9 | 6 | 72 | 43 | 66 | 29 | |
| 2013 | 6 | 1 | Major League Soccer Western Conference | 34 | 14 | 9 | 11 | 35 | 42 | 51 | -7 | |
| 2014 | 9 | 1 | Major League Soccer Western Conference | 34 | 6 | 12 | 16 | 35 | 50 | 30 | -15 | |
| 2015 | 7 | 1 | Major League Soccer Western Conference | 34 | 13 | 8 | 13 | 41 | 39 | 47 | 2 | |
| 2016 | 9 | 1 | Major League Soccer Western Conference | 34 | 8 | 14 | 12 | 32 | 40 | 38 | -8 | |
| 2017 | 6 | 1 | Major League Soccer Western Conference | 34 | 13 | 7 | 14 | 39 | 60 | 46 | -21 | |
| 2018 | 12 | 1 | Major League Soccer Western Conference | 34 | 4 | 9 | 21 | 49 | 71 | 21 | -22 | |
| 2019 | 8 | 1 | Major League Soccer Western Conference | 34 | 13 | 5 | 16 | 51 | 52 | 44 | -1 | |
| 2020 | 8 | 1 | Major League Soccer Western Conference | 23 | 8 | 6 | 9 | 35 | 51 | 30 | -16 | |