Two years later, he played a key role in New Jersey's 2003 Stanley Cup victory after recording seven points (three goals and four assists) in the finals series against the Mighty Ducks of Anaheim.

Eliáš' 2006 playoff campaign was spectacular, despite the fact that the Devils were eliminated by the eventual Stanley Cup champions Carolina Hurricanes in the second round.

In addition to offers from the Chicago Blackhawks and the Montreal Canadiens, Eliáš verbally agreed to sign with the rival New York Rangers on 1 July.

However, negotiations stalled when Rangers general manager Glen Sather would not agree on a no-movement clause in his contract.

[5] Eliáš subsequently called Devils general manager Lou Lamoriello and the two sides agreed on a seven-year, $42 million contract that included a no-movement clause.

On 17 March 2009, Eliáš became the Devils' all-time leading scorer by recording his 702nd career NHL regular season point, an assist on Brian Gionta's shorthanded goal.

Chants of "Pa-trik E-li-as" were heard as Devils' PA announcer Kevin Clark confirmed to the crowd that Eliáš had broken John MacLean's record.

At the conclusion of the season, on 1 April, Eliáš scored his eighth career hat trick, coming against the Philadelphia Flyers.

In the following 2011–12 season, Eliáš scored two goals (347, 348) against the Montreal Canadiens on 17 December 2011 to tie (then surpass) John MacLean as the Devils' leading goalscorer.

On 6 January 2015, in a 4–1 victory against the Buffalo Sabres, he became the 82nd player in NHL history to reach 1,000 career points; he recorded one goal and two assists in the game.