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Karlos Williams out for ACC Championship
0:50 | College Football
Karlos Williams out for ACC Championship
Friday December 5th, 2014

Florida State announced Thursday that senior running back Karlos Williams will not play in Saturday's ACC championship game against Georgia Tech because of a concussion.

In 11 games this season, Williams has rushed for 609 yards and 10 touchdowns.

With Williams sidelined, true freshman Dalvin Cook, who leads the Seminoles with 728 rushing yards this season, expected to start. Sophomore Mario Pender could also see his workload increase.

• STAPLES: Big price, big results? Jim McElwain will face lofty expectations at Florida

Florida State (12-0) was ranked fourth in the latest edition of the College Football Playoff rankings.

If they beat the No. 11 Yellow Jackets (10-2) on Saturday, the Seminoles are expected to remain in the top four, meaning they would have a spot in one of the two Playoff semifinals.

The Playoff selection committee will announce the four teams selected to the Playoff on Sunday.

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