According to interim manager Juan Samuel, Roberts -- activated from the 60-day disabled list on Friday -- is eligible as a substitute, due to the Orioles' lack of reserves. With first baseman Ty Wigginton serving the final day of his two-game suspension, and the O's carrying a 13-man pitching staff, the club only has two position players on the bench -- Roberts and outfielder Corey Patterson.
"Hopefully we will keep our fingers crossed and can survive one more day," Samuel said.
He also added that Roberts' lower back -- which caused the second baseman to miss 91 straight games -- was not bothered by the Rogers Centre turf during Monday's 9-5 loss to the Blue Jays. Roberts will likely be in Wednesday's starting lineup for the O's third and final game in Toronto.
"Brian is good," Samuel said. "That is something we made sure we checked after the game. As you know, Nick [Markakis] also got hit. A little scary for us last night, but those guys are fine."
Markakis was pegged in the right hand by Jays reliever Casey Janssen in the seventh inning. He still started on Tuesday, batting third and playing right field.