Mannino was the #1 player at the end of the 2002-2003 International Racquetball Tour (IRT) Archived 2018-11-27 at the Wayback Machine season, and is a two-time winner of the US Open.

Overall, Mannino won 22 IRT tournaments in his career, placing him 7th on the all-time list,[3] and was runner up on 18 other occasions, so he had a winning record when in a final (22-18).

Mannino’s 193 appearances in IRT tournament puts him 4th all time behind Swain (with 286), Carson (222) and Ruben Gonzalez (216) (through the 2015-16 season).

[4] In 1999, Mannino defeated Swain in the final, 11-8, 4-11, 11-8, 11-8, Sudsy Monchik in the semi-finals, 11-8, 9-11, 11-5, 11-3, and Dan Fowler in the quarterfinals, 11-9, 11-0, 11-4.

Also, Mannino's only one of four men - along with Kane Waselenchuk, Sudsy Monchik and Cliff Swain - to win the US Open more than once.