The Portland Thorns are still monitoring Tobin Heath and Lindsey Horan to determine the severity of their injuries and the club is currently unsure if the two star midfielders will be available for Portland's home opener against the Orlando Pride on April 15.

A week after saying that the Thorns were continuing to evaluate Heath (back injury) and Horan (hip flexor issue) to determine their timelines to return to the field, Thorns coach Mark Parsons said Wednesday that he was still unsure about the severity of the injuries and when the two players would be back on the field.

"We're hoping this is a very short-term thing," Parsons said. "We're still trying to find out a little bit more. We had Lindsey progressing with some of her exercises. Tobin, her exercises are off the field and we're taking it easy... Fingers crossed for short-term. Short-term could be a week."

Heath and Horan are not the only Thorns players coming back from injuries.

Dagny Brynjarsdottir had a setback in her recovery from a back injury about 10 days before the Thorns opened preseason training camp last month and has been unable to participate in preseason training so far. Parsons said Brynjarsdottir may not be ready in time for the home opener.

"April 15 might come a bit too soon," Parsons said. "I'm sure she could be available off the bench. Whether we decide to do that is another question. Why put her on for 20 (minutes) if she's at any risk?"

Katherine Reynolds, who is dealing with a groin strain, is expected to be back in training next week and could be available for the April 15 game.

Hayley Raso, who had been dealing with an ankle injury, was back in training this week and Parsons said she should be "ready to go" in time for the home opener.

Nadia Nadim, who torn the lateral collateral ligament in her knee last fall, played 66 minutes against the Houston Dash in preseason Saturday. Parsons said she is progressing well, but needs to continue to build fitness.

Meg Morris, who fractured her hip last season, played 15 minutes against Houston. Parsons said she is doing well, but also needs to build fitness.

-- Jamie Goldberg | jgoldberg@oregonian.com

503-853-3761 | @jamiebgoldberg