Cahill was one of the more notable names to play at Goodison Park in the Premier League era. Though he will leave Merseyside without any silverware, Cahill was still among the top midfielders in the EPL during his eight-year stint at Everton.
In that stretch, Cahill played 278 times for Everton, scoring 68 goals. He also was a part of the Everton squad that reached the 2009 FA Cup final, where they lost to Chelsea 2-1.
The capture of Cahill is certainly surprising, even though Everton are short on cash. But securing Cahill's signature is a coup for the Red Bulls.
The Red Bulls, who already have designated players Thierry Henry and Rafa Marquez, will likely give Cahill their final DP spot.
After he arrives following the MLS All-Star game, Cahill will give the Red Bulls an attacking threat in midfield, something that they have been sorely missing.
Though Kenny Cooper and Henry have worked well together, both players have faced their droughts this season, which is partially at fault for a disappointing June. But now, with Cahill, he will replace Mehdi Ballouchy and bring in a new feature into the offense.
This is the second major offensive move that New York has made in the past month. Ten days ago, Sebastian Le Toux was traded to the Red Bulls from the Vancouver Whitecaps in place of speedy Jamaican winger Dane Richards.
Considering how well the Red Bulls have played, Cahill doesn't need to immediately play his best. If it is needed, he could get some time off to acclimate himself, though that is unlikely considering his mentality.
Outside of the Red Bulls, this move is great for MLS. Cahill was linked to a move to the Middle East. But instead, he is now working his trade in MLS.
In recent years, MLS has been unable to capture some marquee European names because of the rise of leagues in the Middle East and China. But bringing in Cahill is a prize for a league that is the third-best attended American sports league.
If Cahill can remain on top of his game, MLS will only continue to gain international credibility as a league.