Jack Eugene Sprague is an American former stock car racing driver who has competed in all of NASCAR's three top divisions, most notably in the NASCAR Craftsman Truck Series, where he won series championships in 1997, 1999 and 2001.

The NASCAR Craftsman Truck Series is a pickup truck racing series owned and operated by the National Association for Stock Car Auto Racing (NASCAR), and is the only series in NASCAR to race production pickup truck-based stock cars. The series is one of three national divisions of NASCAR, ranking as the third tier behind the second-tier NASCAR Xfinity Series and the top level NASCAR Cup Series.