Harden left last Sunday's game against the Yankees with shoulder stiffness after six innings. He underwent an MRI that revealed no structural damage.
Geren said Harden would have to throw a side session on Sunday in order to be ready for Tuesday, but the skipper indicated the situation is still touch-and-go.
"What he wants to do is [a] bullpen [session] tomorrow, and if it feels good then try a side [session]," Geren said.
When asked if he had started making backup plans in case Harden isn't ready next week, Geren said it is still too soon to start worrying about that.
"We've got a couple of options," he said. "We've talked about a few different scenarios, but there's no need to get into that until we know tomorrow."
Chavez honors Washington: Eric Chavez had a special gift for his former infield coach and current Texas manager Ron Washington on Saturday at Rangers Ballpark in Arlington.
Chavez teamed up with the Rangers organization to present Washington with a replica of the Gold Glove trophy Washington lost in Hurricane Katrina. Chavez gave the original trophy to Washington in 2004 after earning the award for the third time. But Washington, who has a home in New Orleans, lost the trophy in the disaster. The Rangers had a replica constructed and presented it to Washington prior to Saturday night's game.
"It's all on the Texas Rangers," Chavez said. "It's a pretty classy move by their organization. They asked me about it about 10-12 days ago. I thought it was a great idea. I'm happy to give something back he lost in Katrina. It's pretty cool."
Chavez was moved to give Washington the trophy a few years back.
"I really felt that I would not have accomplished what I accomplished without him, and he was real pivotal to me in that aspect," Chavez said. "I just thought it over, and I felt really compelled. Yeah, your name is on the trophy, but there was somebody who really helped you along to get that. And I thought he was a big part of that."
Washington was moved by the gesture.
"As they say, there is no crying in baseball, but sometimes you get close," the Rangers manager said. "This is one of those moments. This was really a great gesture by the Rangers, and I'll never forget it."
Texas is still home to Street: A's pitcher Huston Street has roots in Texas, and even after three years in Oakland, coming home is something special.
"This is my home state, and a lot of friends get to come up and visit," Street said. "This is my third year, so it's not like my rookie year, when it was such an exciting thing, but it's still Texas. I like the way the air feels. Home is home. There's no substitute for home."
Playing in front of friends and family doesn't change Street's approach to the game, but he does become a little more anxious about getting called into the game.
"I want to get in the game more," he said. "When I'm here, I want to pitch because this is their chance to see me pitch."
Up next: Right-hander Chad Gaudin (1-0, 1.96 ERA) will make his fourth start of the season Sunday against Rangers righty Robinson Tejeda (2-1, 3.32 ERA). First pitch is set for 12:05 p.m. PT at Rangers Ballpark in Arlington.