PHILADELPHIA — MLS All-Star manager Ben Olsen has one more weapon up his sleeve when they face Chelsea on Wednesday night at PPL Park.

Michael Farfan, a star midfielder for the local MLS side Philadelphia Union, has been added to the 18-man squad and will be available for selection when MLS's best take on the European champions in the 2012 AT&T MLS All-Star Game (8:30 pm ET, ESPN2, TeleFutura, TSN/RDS).

The attacking midfielder, who has made 16 starts in this, his second MLS season, relishes the international stage. He catapulted himself onto the scene in his rookie season with a spectacular goal against Real Madrid in a World Football Challenge match last year (watch it here).

WATCH: Farfan's golazo vs. Real Madrid

At 24, Farfan will be the youngest player on the MLS All-Star roster alongside San Jose's Justin Morrow.

In other All-Star news, MLS accepted Chelsea's request to increase the number of substitutions permitted from seven to 10 per team.

Chelsea switched out all 11 starters in their opening two World Football Challenge matches against the Seattle Sounders and Paris Saint-Germain, and Blues manager Roberto Di Matteo made mention of the limited subs in Sunday's postgame press conference.

Said Di Matteo: "We won't be able to make too many changes on Wednesday so we’ll use less players in that game."

Problem solved.