[MLS] For all the wrong reasons 2008 is turning out to be another memorable season in the career of Revs' forward Taylor Twellman.

After playing just 16 of 30 regular-season games and scoring eight goals while battling a series of injuries, he's been sidelined indefinitely for showing concussion-like symptoms, and will not play Thursday in the conference semifinals first leg against Chicago at Gillette Stadium. His participation in the second leg Nov. 6 at Chicago is unlikely.

For the first leg, defender Gabriel Badilla and midfielder Khano Smith are suspended. Steve Ralston, who suffered a broken right fibula Oct. 11 in a match against Kansas City, is out for the season, and Twellman may be as well, depending on how far into the playoffs New England progresses.

Twellman suffered a concussion when accidental punched in the head by Galaxy goalkeeper Josh Wicks during an MLS match Aug. 30. He scored a goal on the play and finished the game, sat out a Concacaf Champions' League game a few days later, then played in all of the Revs' final eight league games of the season.

"Taylor has been suffering some on-going issues related to the concussion he suffered against L.A.," said New England vice president of player personnel Mike Burns. "Concussions, especially repeated concussions, are very dangerous and the most important thing for Taylor and his future - both on the field and off - is to get the rest he needs so he can return to normal as quickly as possible."

Sidelined by torn knee cartilage, an ankle sprain, and a hip flexor injury as well as the aftereffects of the Wicks punch, Twellman still tied for the team lead in goals and has scored 99 goals in his 172 MLS games. Only five players - Jaime Moreno, Jason Kreis, Preki, Ante Razov and Jeff Cunningham - have hit the 100-goal mark in league history.

The Revs go into the playoffs with a 1-5-4 record in their last 10 games and were swept in the season series, 3-0, by Chicago this season. Yet in the past three postseasons, the Revs have eliminated the Fire each time on their way to MLS Cup.