The tension between Minnesota Vikings quarterback Brett Favre and coach Brad Childress has resulted from a disagreement on how much influence each should have in running the offense during games, according to multiple team sources, ESPN.com reported yesterday.

Childress has a reputation for limiting the number of audibles he allows his quarterbacks to call at the line of scrimmage.

Favre, who resisted Childress' attempts to pull him from Sunday night's loss in Carolina, apparently believes his knowledge of the offensive system and 19 years of NFL experience qualify him to make changes based on his extensive film study of opponents.

Bills. Safety Jairus Byrd will require surgery to repair a groin injury, ending the rookie's sensational season. Byrd, who leads the NFL with nine interceptions, was placed on injured reserve, becoming the 18th Bill this year to go on the season-ending list.

Giants. Backup tight end Darcy Johnson was placed on injured reserve with a shoulder injury, and New York signed tight end Scott Chandler from Dallas' practice roster.

Patriots. After missing 10 games with an ankle injury, running back Fred Taylor participated fully in practice for the first time since being sidelined.

New England plays Sunday against the Jacksonville Jaguars, who released Taylor after 11 seasons in which he became their top career rusher.

Elsewhere. Oakland quarterback Charlie Frye has been cleared to play after suffering a concussion against Denver last week, and will start Sunday against his former team, Cleveland ahead of JaMarcus Russell. . . . Pittsburgh safety Troy Polamalu didn't practice again because of his injured left-knee ligament and did not expect to play Sunday against Baltimore.

Kansas City released veteran wide receiver Mark Bradley, who dropped two passes in Sunday's loss to Cleveland. . . . Arizona has placed starting left tackle Mike Gandy on injured reserve after he underwent surgery to repair a sports hernia.