| Year | Team Name | League | Division | Affilate | W | L | Pct | Rank | Managers | Stadium | Playoffs | |
| 2013 | Peoria | Chiefs | Midw | Western | STL | 23 | 21 | .523 | 3 | O'Brien Field | dnq | |
| 2012 | Peoria | Chiefs | Midw | Western | CHC | 63 | 75 | .457 | 7 | Casey Kopitzke | O'Brien Field | dnq |
| 2011 | Peoria | Chiefs | Midw | Western | CHC | 60 | 79 | .432 | 8 | Casey Kopitzke | O'Brien Field | dnq |
| 2010 | Peoria | Chiefs | Midw | Western | CHC | 71 | 66 | .518 | 6 | Casey Kopitzke | O'Brien Field | dnq |
| 2009 | Peoria | Chiefs | Midw | Western | CHC | 81 | 57 | .587 | 1 | Marty Pevey | O'Brien Field | Lost in 1st Round |
| 2008 | Peoria | Chiefs | Midw | Western | CHC | 60 | 78 | .435 | 7 | Ryne Sandberg | O'Brien Field | dnq |
| 2007 | Peoria | Chiefs | Midw | Western | CHC | 71 | 68 | .511 | 5 | Ryne Sandberg | O'Brien Field | dnq |
| 2006 | Peoria | Chiefs | Midw | Western | CHC | 75 | 64 | .540 | 3 | Jody Davis | O'Brien Field | Lost in 1st Round |
| 2005 | Peoria | Chiefs | Midw | Western | CHC | 68 | 72 | .486 | 5 | Julio Garcia | O'Brien Field | dnq |
| 2004 | Peoria | Chiefs | Midw | Western | STL | 75 | 64 | .540 | 3 | Joseph Cunningham | O'Brien Field | Lost in 1st Round |
| 2003 | Peoria | Chiefs | Midw | Western | STL | 65 | 73 | .471 | 6 | Joseph Cunningham | O'Brien Field | dnq |
| 2002 | Peoria | Chiefs | Midw | Western | STL | 85 | 53 | .616 | 1 | Danny Sheaffer | O'Brien Field | League Champions |
| 2001 | Peoria | Chiefs | Midw | Western | STL | 57 | 81 | .413 | 6 | Joe Hall | Pete Vonachen Stadium at Meinen Field | dnq |
| 2000 | Peoria | Chiefs | Midw | - | STL | 63 | 74 | .460 | Tom Lawless | Pete Vonachen Stadium at Meinen Field | dnq | |
| 1999 | Peoria | Chiefs | Midw | Central | STL | 63 | 76 | .453 | 4 | Brian Rupp | Pete Vonachen Stadium at Meinen Field | dnq |
| 1998 | Peoria | Chiefs | Midw | Central | STL | 72 | 68 | .514 | 1 | Jeff Shireman | Pete Vonachen Stadium at Meinen Field | Lost in 1st Round |
| 1997 | Peoria | Chiefs | Midw | Central | STL | 70 | 69 | .504 | 3 | Joseph Cunningham | Pete Vonachen Stadium at Meinen Field | dnq |
| 1996 | Peoria | Chiefs | Midw | Central | STL | 79 | 57 | .581 | 1 | Roy Silver | Pete Vonachen Stadium at Meinen Field | Lost in First Round |
| 1995 | Peoria | Chiefs | Midw | Western | STL | 62 | 72 | .463 | 4 | Roy Silver | Pete Vonachen Stadium at Meinen Field | dnq |
| 1994 | Peoria | Chiefs | Midw | Southern | CHC | 68 | 70 | .493 | 3 | Steve Roadcap | Pete Vonachen Stadium at Meinen Field | dnq |
| 1993 | Peoria | Chiefs | Midw | Southern | CHC | 59 | 79 | .428 | 4 | Steve Roadcap | Pete Vonachen Stadium at Meinen Field | dnq |
| 1992 | Peoria | Chiefs | Midw | Southern | CHC | 62 | 74 | .456 | 4 | Steve Roadcap | Pete Vonachen Stadium at Meinen Field | dnq |
| 1991 | Peoria | Chiefs | Midw | Southern | CHC | 62 | 76 | .449 | 6 | Bill Hayes | Meinen Field | dnq |
| 1990 | Peoria | Chiefs | Midw | Southern | CHC | 55 | 82 | .401 | 8 | Greg Mahlberg | Meinen Field | dnq |
| 1989 | Peoria | Chiefs | Midw | Southern | CHC | 80 | 59 | .576 | 2 | Brad Mills | Meinen Field | dnq |
| 1988 | Peoria | Chiefs | Midw | Southern | CHC | 70 | 70 | .500 | 5 | Jim Tracy | Meinen Field | dnq |
| 1987 | Peoria | Chiefs | Midw | Southern | CHC | 71 | 69 | .507 | 2 | Jim Tracy | Meinen Field | dnq |
| 1986 | Peoria | Chiefs | Midw | Southern | CHC | 77 | 63 | .550 | 2 | Pete Mackanin | Meinen Field | Lost in Finals |
| 1985 | Peoria | Chiefs | Midw | Southern | CHC | 75 | 65 | .536 | 1 | Pete Mackanin | Meinen Field | Lost in Finals |
| 1984 | Peoria | Chiefs | Midw | Southern | CAL | 66 | 73 | .475 | 2 | Joe Maddon | Meinen Field | dnq |
| 1983 | Peoria | Suns | Midw | Southern | CAL | 54 | 85 | .388 | 4 | Joe Coleman | Meinen Field | dnq |