Source: Big Ben to be re-examined
But an initial medical examination revealed no significant damage, a team source said.
Roethlisberger initially complained about feeling considerable pain but later reported that it had begun to subside.
Roethlisberger was expected to be re-examined Friday and his playing status for the team's game against the Redskins remained undecided.
However, he did travel with the team Friday to Washington, D.C., according to the Pittsburgh Post-Gazette.
Roethlisberger had an ice pack on the back of his right ankle when he was carted off at the end of Thursday's workout, with offensive coordinator Bruce Arians accompanying him.
Roethlisberger didn't talk to reporters, but he could be overheard saying, "Oh it just feels great. It feels like a car ran over it."
As the Steelers' starting offense practiced against the starting defense, Starks couldn't handle a rush from linebacker James Harrison, the 2008 NFL defensive player of the year.
"But you never like to see your quarterback hurt," said Starks.
Starks went down to one knee as he tripped Roethlisberger, who stayed on the turf for about five minutes.
Ed Werder is an NFL reporter for ESPN. Information from The Associated Press was used in this report.