Strong safety LaRon Landry described himself as “disappointed” that he can’t play in Thursday night’s preseason game at Baltimore, but said Tuesday he hopes his strained right hamstring will heal in time for him to play in the regular season opener on Sept. 11.

Landry has spent all of training camp and the first two weeks of the preseason on the Physically Unable to Perform (PUP) list while he strengthens the strained left Achilles’ tendon that forced him out of the final seven games of the 2010 season. Landry was hoping to get off the PUP list last Sunday, and aimed to play Thursday night at Baltimore. But coach Mike Shanahan revealed Sunday that Landry instead was not yet ready to return after injuring his hamstring.

“When we were in Indy, it was like a freak accident,” Landry said. “I was finishing my running and was just slowing down, and I guess I slowed down too fast, or something. It wasn’t a major pop, I didn’t feel, but it’s kinda upsetting.”

Landry says he is eager to return to the field, and hopes to pick up where he left off last season, when he recorded 85 tackles and an interception in nine games. During the offseason, Landry received platelet rich plasma (PRP) therapy on his Achilles’ tendon and had surgery on his shoulder and wrist.

He said he isn’t worried that his body will break down over a full season or that his hamstring injury will be a recurring problem.

“Nah, I’m not thinking like that,” he said. “It was a freak accident. My hamstrings were fine.

“It happened for a reason, so I won’t say I’m frustrated, but I’m more disappointed more than anything,” Landry added. “I’m just ready to get back out there, do what I do, basically. It’s just another speed bump. I’m not going to be down on myself. I’m just looking for the positive. I’ll be ready Sept. 11, hopefully. It’s been a real long time for me. Since November.”