| 2019 | Potomac Nationals | Caro | Northern | 137 | 70 | 67 | .511 | 11.5 | 598 | 580 | 18 | Tripp Keister | | 192,474 | 0 | Northwest Federal Field at Pfitzner Stadium | dnq |
| 2018 | Potomac Nationals | Caro | Northern | 136 | 74 | 62 | .544 | -- | 656 | 515 | 141 | Tripp Keister | | 237,244 | 0 | Northwest Federal Field at Pfitzner Stadium | Lost in finals |
| 2017 | Potomac Nationals | Caro | Northern | 140 | 63 | 77 | .450 | 24.5 | 570 | 590 | -20 | Tripp Keister | | 236,010 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2016 | Potomac Nationals | Caro | Northern | 138 | 73 | 65 | .529 | 10.0 | 619 | 589 | 30 | Tripp Keister | | 195,448 | 0 | G. Richard Pfitzner Stadium | Lost in Semi-Finals |
| 2015 | Potomac Nationals | Caro | Northern | 139 | 65 | 74 | .468 | 6.5 | 520 | 531 | -11 | Tripp Keister | | 217,892 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2014 | Potomac Nationals | Caro | Northern | 136 | 78 | 58 | .574 | -- | 635 | 627 | 8 | Tripp Keister | | 243,559 | 0 | G. Richard Pfitzner Stadium | League Champions |
| 2013 | Potomac Nationals | Caro | Northern | 139 | 84 | 55 | .604 | -- | 680 | 590 | 90 | | | 236,772 | 0 | G. Richard Pfitzner Stadium | Lost in Finals |
| 2012 | Potomac Nationals | Caro | Northern | 139 | 64 | 75 | .460 | 7.5 | 590 | 700 | -110 | Brian Rupp | | 191,928 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2011 | Potomac Nationals | Caro | Northern | 139 | 68 | 71 | .489 | 12.0 | 583 | 627 | -44 | Matthew LeCroy | | 171,096 | 0 | G. Richard Pfitzner Stadium | Lost in Semi-Finals |
| 2010 | Potomac Nationals | Caro | Northern | 139 | 70 | 69 | .504 | 1.5 | 665 | 642 | 23 | Gary Cathcart | | 205,279 | 0 | G. Richard Pfitzner Stadium | League Champions |
| 2009 | Potomac Nationals | Caro | Northern | 137 | 79 | 58 | .577 | 4.0 | 674 | 591 | 83 | Trent Jewett | | 180,541 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2008 | Potomac Nationals | Caro | Northern | 140 | 79 | 61 | .564 | -- | 720 | 600 | 120 | Randy Knorr | | 177,760 | 0 | G. Richard Pfitzner Stadium | League Champions |
| 2007 | Potomac Nationals | Caro | Northern | 137 | 69 | 68 | .504 | 6.0 | 682 | 649 | 33 | Randy Knorr | | 161,581 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2006 | Potomac Nationals | Caro | Northern | 140 | 64 | 76 | .457 | 4.0 | 623 | 715 | -92 | Edgar Caceres | | 151,507 | 0 | G. Richard Pfitzner Stadium | no info |
| 2005 | Potomac Nationals | Caro | Northern | 140 | 63 | 77 | .450 | 16.0 | 674 | 696 | -22 | Bob Henley | | 138,143 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2004 | Potomac Cannons | Caro | Northern | 139 | 67 | 72 | .482 | 10.0 | 690 | 639 | 51 | Edgar Caceres | | 170,278 | 0 | G. Richard Pfitzner Stadium | Lost in Semi-Finals |
| 2003 | Potomac Cannons | Caro | Northern | 139 | 62 | 77 | .446 | 16.0 | 543 | 579 | -36 | Jayhawk Owens | | 160,238 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2002 | Potomac Cannons | Caro | Northern | 140 | 59 | 81 | .421 | 30.0 | 555 | 646 | -91 | Joseph Cunningham | | 182,059 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2001 | Potomac Cannons | Caro | Northern | 140 | 66 | 74 | .471 | 12.0 | 532 | 566 | -34 | Joseph Cunningham | | 181,758 | 0 | G. Richard Pfitzner Stadium | dnq |
| 2000 | Potomac Cannons | Caro | Northern | 138 | 62 | 76 | .449 | 4.5 | 597 | 642 | -45 | Joseph Cunningham | | 167,988 | 0 | G. Richard Pfitzner Stadium | dnq |
| 1999 | Potomac Cannons | Caro | Northern | 139 | 54 | 85 | .388 | 23.5 | 619 | 718 | -99 | Joseph Cunningham | | 209,168 | 0 | G. Richard Pfitzner Stadium | dnq |
| 21 record(s) |