GALAXY: Is Keane's season finished?

Robbie Keane was acquired in part to help prod the Galaxy to the MLS Cup title, but it's looking like he could miss the entire run.

Keane's injury was diagnosed by Irish national team doctors as a grade-two torn muscle in the back of his thigh, and it could keep him out as long as six weeks -- until the Nov. 20 MLS Cup final at Home Depot Center.

“We'll know more in 10 days,” he told British broadsheet The Guardian. “I've got to get another scan, and, hopefully, it settles down and isn't as bad as when I had the first scan done [after aggravating the injury in a European Championship qualifier last Friday], when there was a lot of bleeding. I'll go back to [the Galaxy] and see. It's a four-to-six-week injury, and it will be touch and go.”

Keane is due to arrive in Los Angeles on Thursday night.

“We'll know more when he gets back here,” Galaxy coach Bruce Arena said Monday. “Can't tell until he gets back here and we have our people look at him.”

Keane took an existing injury to Europe for Ireland's final two Euro 2012 qualifying group games and aggravated it while setting up Kevin Doyle in the seventh minute for the first goal in a 2-0 victory Friday in a Euro 2012 qualifier in Andorra. Rather than signal that he needed to come off the field, Keane soldiered on for the full 90 minutes.

“I actually did it on Kevin's goal,” Keane said. “The adrenaline gets you through, but straight after the game, I knew that it was a tear. Of course, I would take injections, [but] this is different. It's a muscle injury and not just pain. It's a grade-two tear -- grade-three is the worst.

“It's disappointing, and I'll do my best to get back. The medical facilities are very, very good in L.A., and, hopefully, the doctors over there will get me back.”

Ireland manager Giovanni Trapattoni criticized Keane for not taking himself out of game when he was hurt.

“He made it worse [by continuing to play],” the Italian coach told The Guardian. “I said to him that he should have said immediately and maybe go off. It should be immediately with muscle [injuries]. Never discuss, never put into question the muscular problems.”

Keane watched as Ireland beat Armenia on Tuesday to advance to a home-and-home playoff next month for a berth in next year's European Championship in Poland and the Ukraine.

The Irish were matched with Estonia in a draw Thursday in Krakow and will play Nov. 11 in Tallinn and Nov. 15 in Dublin. Keane is doubtful for these games, too.

The other playoff matchups: Turkey-Croatia, Czech Republic-Montenegro and Bosnia & Herzegovina-Portugal.