Robert Griffin Iii

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Washington Redskins quarterback Robert Griffin III scrambles with the ball during the first half of an NFL football game against the New York Giants in Landover, Md. Monday, Dec. 3, 2012. (AP Photo/Nick Wass)

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Robert Griffin III looked "better" in practice Thursday, but he's still "probably" going to be a game-time decision Sunday, according to Redskins coach Mike Shanahan. (Associated Press)

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Redskins quarterback Robert Griffin III has just four interceptions in 325 attempts, a 1.23 percentage. The record for rookies is 1.98, set by Charlie Batch with Detroit in 1998. Griffin also has thrown for 17 touchdowns. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III waves as he attends an NBA basketball game between the Washington Wizards and the Miami Heat, Tuesday, Dec. 4, 2012, in Washington. (AP Photo/Nick Wass)

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Washington Redskins quarterback Robert Griffin III waves as he attends an NBA game between the Washington Wizards and the Miami Heat, Tuesday, Dec. 4, 2012, in Washington. (AP Photo/Nick Wass)

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Washington Redskins quarterback Robert Griffin III (10) celebrates after the Washington Redskins defeat the New York Giants 17-16 on Monday Night Football at FedEx Field, Landover, Md., Dec. 3, 2012. (Andrew Harnik/The Washington Times)

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Washington Redskins wide receiver Josh Morgan (15) celebrates with Washington Redskins wide receiver Pierre Garcon (88) after scoring on a 13-yard run off of a fumble by quarterback Robert Griffin III (10) to put the Redskins up 7-3 in the first quarter as the Redskins play the New York Giants on Monday Night Football at FedEx Field, Landover, Md., Dec. 3, 2012. (Andrew Harnik/The Washington Times)

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Washington Redskins wide receiver Josh Morgan (15) shrugs after scoring on a 13-yard run off of a fumble by quarterback Robert Griffin III (10) to put the Redskins up 7-3 in the first quarter as the Redskins play the New York Giants on Monday Night Football at FedEx Field, Landover, Md., December 3, 2012. (Andrew Harnik/The Washington Times)

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Washington Redskins wide receiver Josh Morgan (15) scores on a 13 yard run after picking up a fumble by Washington Redskins quarterback Robert Griffin III (10) to put the Redskins up 7-3 in the first quarter as the Washington Redskins play the New York Giants on Monday Night Football at FedEx Field, Landover, Md., Dec. 3, 2012. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III (10) warms up before the Washington Redskins play the New York Giants for monday night football at FedEx Field, Landover, Md., Monday, December 3, 2012. (Andrew Harnik/The Washington Times)

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Washington Redskins wide receiver Josh Morgan (15) celebrates with Washington Redskins wide receiver Pierre Garcon (88) after scoring on a 13 yard run off of a fumble by quarterback Robert Griffin III (10) to put the Redskins up 7-3 in the first quarter as the Washington Redskins play the New York Giants for Monday Night Football at FedEx Field, Landover, Md., Monday, December 3, 2012. (Andrew Harnik/The Washington Times)

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Washington Redskins wide receiver Josh Morgan (15), center, laughs on the sideline after scoring on a 13 yard run off of a fumble by Washington Redskins quarterback Robert Griffin III (10) to put the Redskins up 7-3 in the first quarter as the Washington Redskins play the New York Giants for monday night football at FedEx Field, Landover, Md., Monday, December 3, 2012. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III (10) and Washington Redskins offensive coordinator Kyle Shanahan, right, on the sideline after Washington Redskins wide receiver Josh Morgan (15) scores on a 13 yard run off of a fumble by Washington Redskins quarterback Robert Griffin III (10) to put the Redskins up 7-3 in the first quarter as the Washington Redskins play the New York Giants for monday night football at FedEx Field, Landover, Md., Monday, December 3, 2012. (Andrew Harnik/The Washington Times)

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Washington Redskins quarterback Robert Griffin III (10) and Washington Redskins wide receiver Pierre Garcon (88) celebrate on the sideline after Washington Redskins wide receiver Josh Morgan (15) scores on a 13 yard run off of a fumble by Washington Redskins quarterback Robert Griffin III (10) to put the Redskins up 7-3 in the first quarter as the Washington Redskins play the New York Giants for monday night football at FedEx Field, Landover, Md., Monday, December 3, 2012. (Andrew Harnik/The Washington Times)