Roberts is scheduled to end his 20-day rehab stint on Monday after a long battle with concussion symptoms.
If there are no setbacks, it is expected that Roberts will be activated from the 60-day disabled list and be available to the Orioles on Tuesday.
Roberts went 0-for-4 on Sunday in what was likely his last Minor League game before meeting with the Major League club during its Monday off-day.
Manager Buck Showalter was noncommittal about Roberts' immediate future.
"I don't know, we'll see," Showalter said. "As far as where he's playing and what position he's hitting and all that stuff, I haven't made that lineup out yet."
In 13 Minor League games spread between Class A Delmarva, Double-A Bowie and Triple-A Norfolk, Roberts has hit .238 with a home run and four RBIs.
Showalter was also hesitant to discuss what Roberts' return would mean for Robert Andino, who has filled in for Roberts at second base to start the 2012 season.
"There's some good options," Showalter said. "Robert has been a guy I've always felt comfortable playing anywhere."
Showalter even mentioned the outfield as a possibility for Andino, although he has played there only sparingly to this point in his career.
"I think Robert would be an above-average defender everywhere in the infield," Showalter said.
The Orioles will need to make a spot on both the 25- and 40-man rosters if Roberts returns, which could mean the end of Steve Tolleson's time in Baltimore.
Tolleson started at third base Sunday and delivered the game-tying three-run home run in the fourth before making a diving stop in the sixth that got starter Jason Hammel through his final inning.
"I knew that I was up here on borrowed time," Tolleson said. "I don't know if that's going to be the end of it. [I'm] very excited to have Brian Roberts back on this team, whether it means I'm going to Triple-A or whatever. Roberts is irreplaceable on this team, and we're excited to have him come back."
"Obviously, we're hoping that Robby joins us Tuesday," Showalter said. "We'll have a decision to make, and unlike years past, we'll be sending some people out that we'd like to keep."