Win or lose, the Seattle Sounders were dealt a serious blow on Monday. Osvaldo Alonso, arguably their least replaceable player, came out of the match in the 56th minute with an apparent hamstring injury. He was replaced by Micheal Azira.
The injury was non-contact, coming on a seemingly innocuous play at midfield. Alonso immediately went to the ground and clutched his leg. A few minutes later, he was removed from the match.
Alonso has only missed one match this season and no outfield player had logged more than his 2,952 minutes during the regular season. But it's not just that he's been the Sounders' workhorse. Alonso is arguably the top defensive midfielder in the league and no player in the league with at least 200 minutes played has a better passing percentage.
Even if the Sounders are able to get through, the prospects of advancing past the LA Galaxy would be far tougher without a healthy Alonso.