Charles "Chuck" Waseleski (November 30, 1954 – April 7, 2016) was an American pioneering sabermetrician from Massachusetts. Waseleski was called "the czar of hardball software" by Boston Globe sportswriter Dan Shaughnessy, but was most famously known in Boston as "The Maniacal One", a sobriquet often seen on the sports pages of the Globe. The nickname, coined by Steve Fainaru and continued in use by Gordon Edes, Peter Gammons, and Nick Cafardo, honored Waseleski's extreme attention to detail.