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Ross D. Franklin, Associated Press
Arizona Cardinals' John Skelton (19), the Cardinals third-string quarterback, looks to make a throw against the St. Louis Rams during the fourth quarter of an NFL football game Sunday, Dec. 5, 2010, in Glendale, Ariz. The Rams defeated the Cardinals 19-6.

TEMPE, Ariz. — Arizona Cardinals coach Ken Whisenhunt isn't ready to name a starting quarterback for Sunday's game against the Denver Broncos.

Rookie John Skelton and newly signed Richard Bartel (Bar-TELL) took reps with the first unit in Wednesday's practice. They were the team's only healthy quarterbacks.

Starter Derek Anderson hasn't been cleared to play because of a concussion he suffered in last Sunday's 19-6 loss to St. Louis. Rookie Max Hall went down with a season-ending shoulder injury in that game.

Whisenhunt said he will decide later in the week what direction he will go.

Arizona has lost seven in a row and ranks next-to-last in the NFL in offense.