Hamilton took some swings Tuesday, but was shut down due to recurring pain. He then received a pair of shots Wednesday to ease the discomfort he has felt since he collided with the outfield wall in Minnesota on Sept. 4.
Manager Ron Washington said Friday he hopes the shots take effect before the Rangers leave Seattle on Sunday night and Hamilton can begin baseball-related activities by the time they get to Oakland for a four-game series beginning Thursday.
"In 48 hours, we'll know something, Washington said. "That means by the time we get out of here, maybe he can start doing something in Anaheim. We'll know. Right now, if I said anything, it would only be speculation."
Washington said Hamilton would remain with the club once the pain subsides as opposed to going to the instructional league in Arizona to get some extra work.
"We've just got to play it by ear," Washington said. "A lot of it is going to be up to him, if he can handle what's going on. We can't push him out there if he doesn't feel comfortable."
Hamilton has missed the Rangers' last 10 games. He is batting .361 with 31 homers and 97 RBIs this season.
When he does return, he will see some time at designated hitter as well as in left field. Washington added he would like to see Hamilton play the entire final homestand of the year in order to get enough at-bats to feel comfortable heading to the postseason.
"Probably like him to get about 30 [at-bats]," Washington said. "That means that that homestand at home I'd like to see him play every single game."