NWL Single-Season Win/Loss Records NWL Single-Season Winning % Records Most Wins Best Winning Percentage 52 - Wisconsin Rapids Rafters (52-20) 2017 .746 - Rochester Honkers (50-17) 2006 51 - Waterloo Bucks (51-19) 2013 .729 - Waterloo Bucks (51-19) 2013 50 - Lakeshore Chinooks (50 - 21) 2014 50 - Rochester Honkers (50-17) 2006 Worst Winning Percentage .236 - Kalamazoo Growlers 2015 Most Losses .241 - Dubuque Mud Puppies (13-41) 1995 55- Kalamazoo Growlers (17-55) 2015 52 - Rochester Honkers (20-52) 2016 Best Winning Percentage, First Half 51 - Thunder Bay Border Cats (21-51) 2016 .800 - Waterloo Bucks (24-6) 1998 50 - Alexandria Blue Anchors (22 - 50) 2014 .800 - Mankato MoonDogs (28-7) 2012 50-Battle Creek Bombers (20-50) 2010 50- Wisconsin Rapis Rafters (20-50) 2010 Best Winning Percentage, Second Half .789 - St. Cloud Rox (30-8) 2015 Most Wins, First Half .788 - Rochester Honkers (26-7) 2006 28 - Mankato MoonDogs (28-7) 2012 27 - Wisconsin Rapids Rafters (27-9) 2017 Worst Winning Percentage, First Half 26 - La Crosse Loggers (26-9) 2012 .172 - Grand Forks Channel Cats (5-24) 1999 Most Wins, Second Half Worst Winning Percentage, Second Half 30 - St. Cloud Rox (30-8) 2015 .167 - Austin Southern Minny Stars (5-25) 1999 28 - Alexandria Beetles (28-11) 2011 .167-Battle Creek Bombers (6-30) 2010 27- Waterloo Bucks (27-9) 2013 26 - Lakeshore Chinooks (26 - 11) 2014 26 - Rochester Honkers (26-7) 2006 26 - Duluth Huskies (26-8) 2006 26 - Wisconsin Woodchucks (26-9) 2012 Most Losses, First Half 28 - Thunder Bay Border Cats (6 - 28 ) 2016 28 - Rochester Honkers (7 - 28 ) 2016 27 - Duluth Huskies (9 - 27) 2014 25 - Kalamazoo Growlers (9-25) 2017 25 - Kalamazoo Growlers (8-25) 2015 25 - Alexandria Blue Anchors (9 - 25) 2014 25 - Brainerd Mighty Gulls (7-25) 1998 25 - Wisconsin Rapids Rafters (8-25) 2011 25 - Thunder Bay Border Cats (9-25) 2009 25 - St Cloud Rox (9-25) 2012 Most Losses, Second Half 30 - Kalamazoo Growlers (9-30) 2015 30- Battle Creek Bombers (6-30) 2010 28 - Thunder Bay Border Cats (9 - 28) 2014 28- Wisconsin Rapids Rafters (9-28) 2010 27 - Thunder Bay Border Cats (8-27) 2013 26 - Green Bay Bulfrogs (11-26) 2017 26 - Wisconsin Woodchucks (11-26) 2017 26 - Kenosha Kingfish (10 - 26 ) 2016 25 - Alexandria Blue Anchors (13 - 25) 2014 25 - La Crosse Loggers (12 - 25) 2014 25 - Rochester Honkers (10-25) 2013 25 - Austin Southern Minny Stars (5-25) 1999 25 - Austin Southern Minny Stars (7-25) 1998 25 - Thunder Bay Border Cats (8-25) 2006 25 - La Crosse Loggers (10-25) 2007 25 - Wisconsin Woodchucks (12-25) 2011.