3 time FLCC Finalist. Third place in the 12k at the 2003 USA Cross Country Championships. He was eighth that year in the 10,000 at the USATF Championships. He was tenth in the 2002 NCAA Cross Country Championships while at the University of Colorado and was part of the National Championship Team.
2011 Foot Locker National Champ
4x Wisconsin State Cross Country Champion. 8x Wisconsin State Track Champion. Member of the 2011 Junior National Cross Team. 2011 Gatordade Cross Country Athlete of the Year.
1980 Kinney (now Foot Locker) 3rd Place.
2 x Wisconsin State XC Champion.
1985 NCAA State XC Champion. 3 x Big Ten (1981, 1984 and 1985) and District IV (1981, 1982 and 1985) cross country champion. 5 x track All-American (three times on the distance medley relay and once each in the 5,000 meters and the 1,500 meters) 2x Big Ten 1500m Champ.
1997 United States Cross Country Champ. 1989 5000m Champ.
Hacker's PR in the 1,500-meter run is 3:34.66 which one is of the top marks in US history.