During the 2002 season, Witt played in the SG Ball Grand Final, where his Parramatta team was defeated 18-16 by the Western Suburbs Magpies.

But Witt sparked the disappointing Eels to life, and the team won ten from their last fourteen games of the season to narrowly miss qualifying for the semi-finals.

In one of his early games in the NRL he encountered extreme disappointment in missing two crucial, but easy (by his standards) goals which saw Parramatta lose narrowly 18–16 to the New Zealand Warriors.

His great first season in the NRL saw him win Parramatta's Rookie of the Year award as well as being selected in the New South Wales Under 19 team to play Queensland in an interstate representative match.

Witt, along with fellow blue chip signings Ben Kennedy and Brent Kite, added much needed player strength at Manly in 2005 and the club qualified for its first semi finals series since 1998 and finished in eighth position.

Among the highlights were excellent performances in the victories over eventual Premiers Wests Tigers and in the amazing come-from-behind win against the Penrith Panthers.

Penrith led 26-6 early in the second half, before a Witt-inspired Manly team powered home to win 36–26 at Brookvale Oval.

Manly coach Des Hasler used a number of forwards at five-eighth in subsequent games, but with very little success, and Witt was drafted back into the side for the semi-final against Parramatta.

Starting the year in the NSWRL Premier League, Witt's class shone even further in lesser company, playing at both five-eighth and halfback and helping Manly to a number of large victories, with the team finishing fourth and just missed qualifying for the Grand Final.

Witt settled in well within the team and his good early season form impressed club officials enough to quickly extend his contract from the original one-year deal to the end of 2009.

[6] Following this win against the Rabbitohs though the Warriors fell into a slump, losing their next five games with Witt being briefly shifted to halfback after the regular no.7 Grant Rovelli was dropped for poor form.

Also during this losing streak Witt received a one-week suspension for a dangerous throw on Misi Taulapapa in the Warriors' narrow loss to Cronulla at Mount Smart Stadium.

Also during 2007, Witt broke Daryl Halligan's record for the best success rate in a season, with his kicking percentage for the year being 92.5% (62 goals from 67 attempts).

Witt struggled on his return and was dropped after two games, however the Warriors' mid season slump failed to be halted with new halves Nathan Fien and Grant Rovelli, and following a narrow loss to last placed South Sydney on which goalkicking was decisive, Witt returned for the Round 22 game against the Brisbane Broncos on which the team began a remarkable surge towards the semi-finals to finish in 8th position, setting up a sudden death Qualifying Final match against the Melbourne Storm at Olympic Park Stadium.

Suddenly Manu Vatuvei made a break down field, finding Witt in support who taunted the Melbourne defenders by waving the ball in the air before placing it down to give the Warriors a shock 18–15 win.

In late 2005, Witt was photographed at the Radisson Kestrel Hotel, Manly (now the Manly Sebel) for the League Of Their Own 2006 calendar that was produced in the style of the famous Dieux du Stade calendars to raise money for the Koori Kids foundation, and following this Witt was included in Cosmopolitan magazine's Boys With Balls '06 feature which profiled 20 of the sexiest footballers of the year from both the NRL and AFL competitions.

He was also the male centrefold for the November 2006 issue of Cleo magazine, and was featured on the front cover of the Naked Rugby League 2007-08 charity calendar (and for February 2007) with proceeds from its sales going to the National Breast Cancer Foundation of Australia.

In late 2008 Witt was photographed at the home of celebrity agent Max Markson in Dover Heights for inclusion in both the Rugby League and International editions of the Gods of Football calendars, a charity initiative to raise funds for the McGrath Foundation.