Williams injures shoulder in return to Miami's lineup
The Steelers did not immediately disclose a reason for Smith's absence. He was not listed on the team's injury list last week and had started 28 consecutive games.
Starks was beaten out at right tackle by Willie Colon during training camp and has since played as a backup and on some third downs as a blocking tight end.
Information from ESPN.com senior NFL writer John Clayton and The Associated Press was used in this report.
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