|Ballpark||Silver Cross Field|
|Division championships||1 (2002)|
|Former name(s)||Joliet JackHammers (2002–10)|
|Colors||navy blue, columbia blue, orange, white
|General Manager||Jamie Toole|
|Media||Joliet Herald News|
The Joliet JackHammers were a professional baseball team based in Joliet, Illinois, in the United States. The JackHammers were a member of the Northern League, which is not affiliated with Major League Baseball. From 2002 to 2010, the JackHammers played their home games at Silver Cross Field.
Their first season was the 2002 season. Their first playoff appearance came in that season.
The 2008 Jackhammers were managed by one time Arizona Diamondback managerial candidate Wally Backman. The primary radio announcer was Jon Versteeg.
The Jackhammers, in response to extremely low attendance in 2009, had a total makeover to start the 2010 season. Everything, from the roster and management, all the way down to the uniforms, was re-done. Their offseason advertising campaign was also very aggressive, and included everything from newspaper ads to billboards. The Jackhammers made the playoffs for the first time in 8 years, making the season a success performance-wise. They still lagged in attendance, averaging about 3,500 fans a game, 4th in the league.
- Founded: 2002
- Playoff appearances: 2002, 2010
- Divisional titles won: 2002
- League Championships won: None
The team was sold in December 2010 after months of negotiations to Steel City Baseball LLC. Steel City bought all assets to the team seeing as they owed $220,000 to the city. With the sale, none of the unpaid bills will be paid off. Steel City changed the team's name for the 2011 season, and the team joined the Frontier League. On January 12, 2011 GM John Dittrich announced for the 2011 season the new team would be called the Joliet Slammers. The team will continue to use Silver Cross Field as their home venue.
|First Half||Second Half||Overall|
|2002||South||22-23||3rd||31-15||1st||53-38||.582||Lost Central semi-final|
|2003||East||19-25||4th||21-23||4th||40-48||.455||Did not qualify|
|2004||South||24-24||3rd||25-23||3rd||49-47||.510||Did not qualify|
|2005||South||23-25||5th||13-35||6th||36-60||.374||Did not qualify|
|2006||South||16-32||4th||26-23||2nd||42-55||.433||Did not qualify|
|2007||South||22-26||2nd||23-25||3rd||45-51||.469||Did not qualify|
|2008||N/A||43-53||5th||N/A||N/A||43-53||.448||Did not qualify|
|2009||N/A||32-63||6th||N/A||N/A||32-63||.337||Did not qualify|
Joliet JackHammers roster