Police investigating December stabbing of MLS player Marco Pappa

Police are investigating how MLS player Marco Pappa was stabbed in the stomach last month.

The Seattle Sounders traded Pappa to the Colorado Rapids for allocation money on Dec. 15. It was not immediately clear when the stabbing took place.

Seattle TV station King 5, which first reported the incident, said Pappa was taken to a Seattle hospital after police found him bleeding.

Police told ABC News they are investigating the incident but no charges have been filed.

"We are aware of the situation and have notified Major League Soccer," the Rapids said in a statement to ABC News.

"We have spoken with the player and will cooperate with the League on their evaluation of this matter. At this time we will have no further comment."

During the incident, Pappa, 28, was allegedly with Stormy Keffeler, who resigned her crown as Miss Washington USA on Thursday for not disclosing a previous drunken-driving conviction to pageant officials.

For that offense, Keffeler was arrested in April and pleaded guilty in September.

Pappa himself was arrested for driving under the influence in July and missed five games.