Osvaldo Alonso ruled out for Wednesday's CCL match

It wasn't all sunshine and unicorns at Seattle Sounders training on Tuesday. Yes, they were able to announce the signing of one new midfielder, but it was also revealed that another would be out of action for an unclear amount of time.

Osvaldo Alonso will at least miss Wednesday's CONCACAF Champions League match against the Vancouver Whitecaps and doesn't sound like to play on Sunday against the LA Galaxy, either. Alonso was hurt badly enough on Saturday that the Sounders played the final five minutes or so down a man while Alonso was treated on the sideline.

"There's a slight hamstring injury, not as bad as the last one," Sounders head coach Sigi Schmid said. "It's a week-to-week thing."

Alonso has been dealing with leg muscle injuries most of the season, missing eight games in total. The defensive midfielder had offseason surgery that cost him the first three games and then he missed five more between June 6 and June 28.

Without Alonso in the lineup, the Sounders have gone 2-5-1 and allowed 11 goals. With Alonso in the lineup, the Sounders have gone 8-6-1 and allowed 13 goals. Micheal Azira has started all eight games in which Alonso has been out.