MILWAUKEE — The Green Bay Packers have filed tampering charges against the Minnesota Vikings alleging that the team made inappropriate contact with Brett Favre, a person familiar with the Packers' complaint told The Associated Press Wednesday night.

The person, who requested anonymity because of the sensitivity of the subject, said Packers officials have expressed their belief that interest from the Vikings was driving Favre's sudden change of heart about playing football in 2008.

"They feel like Favre had something (in place), and that's why he was so anxious to get his release all of a sudden," the person said.

The tampering charges were reported by Foxsports.com earlier Wednesday.

The person said the league already has reviewed evidence provided by the Packers, and team officials believe a league examination of telephone records will indicate more than "normal contact" between Favre and Vikings offensive coordinator Darrell Bevell, a former Green Bay assistant. According to the person, Packers officials also believe the contact began before Favre and his agent, Bus Cook, formally asked the Packers to release him.

NFL spokesman Greg Aiello said the league had no comment on the report. Cook did not return a telephone message left by The Associated Press earlier Wednesday.

The tampering charges added a new twist to the Favre saga, which seemed to be over when Favre retired in early March, but now has been sizzling for several weeks.

Now, with Favre potentially headed back to an even chillier reception than the below-zero conditions in his last game at Lambeau Field when he makes a scheduled appearance at the Packers' Hall of Fame banquet this weekend, the next step in the iconic quarterback's plan to maneuver his way out of Green Bay is unclear.

Cook, told ESPN on Wednesday that he and Favre have "no definite plans to ask for reinstatement" and it was up to the Packers to decide what to do next.

"It's their move," Cook said.

Favre currently is on the Packers' reserve/retired list. To be reinstated, Favre must write a letter to NFL commissioner Roger Goodell. Once that request is approved — a step considered a formality — the Packers would have to release Favre or place him on their active roster.

CHIEFS SIGN DRAFT PICK KEVIN ROBINSON: The Chiefs agreed to three-year deals with draft picks Kevin Robinson and Brian Johnston on Wednesday. Terms of the contracts were not available.

Robinson, a receiver, was one of Kansas City's two sixth-round picks. He caught 178 passes for 2,485 yards in 46 games for Utah State. He set school records with 1,104 yards and four touchdowns on punt returns, and 2,725 yards and four touchdowns on kickoff returns.

Johnston, a defensive end, was one of the Chiefs' two seventh-round picks. He had 268 tackles and 21 sacks in four years at Gardner-Webb. He also forced 10 fumbles, recovered three, and blocked one kick.

CHAIN SAW 1, MIAMI QB'S FINGER 0: Dolphins quarterback Josh McCown has decided to quit using chain saws, which should please his team.

A brush with a chain saw two weeks ago left McCown with a cut on the index finger of his throwing hand that required six stitches. But he expects to be ready for the start of training camp next week, said his agent, Mike McCartney.

"He has been throwing the football, and he's even playing golf," McCartney said. "He's fine."

The accident occurred at McCown's home in Jacksonville, Texas, while he and his brother, Tampa Bay quarterback Luke McCown, were cutting a tree stump.

McCown pledged to stay away from chain saws once he arrives in South Florida this week, McCartney said. The Dolphins open camp July 26.

Miami signed McCown to a $6.25 million, two-year contract in February. He'll bid to become the 13th starting quarterback for Miami since Dan Marino retired following the 1999 season.

McCown will compete with holdover John Beck and rookie Chad Henne. Last year McCown started nine games for the Oakland Raiders, throwing for 10 touchdowns with 11 interceptions.

NFL STEPS UP MONITORING OF GANG SIGNS: The NFL is stepping up its monitoring of on-field player activities to ensure that no one is flashing the hand signals of street gangs.

The Los Angeles Times reported Tuesday that the league had hired experts to look at game tapes and identify players or team officials who might be using suspected gang signals. Violators would be warned and disciplined if the episodes recurred.

League officials said Tuesday that avoiding gang-related activities has long been stressed.

They said the scrutiny was intensified after the shooting death of Denver cornerback Darrent Williams in 2007 after Williams was involved in a dispute with known gang members. Anti-gang information is included in orientation literature and stressed in the annual mandatory league meeting for rookies.

The NFL took further notice after Paul Pierce of the NBA's Boston Celtics was fined $25,000 in April for what the league said was a "menacing gesture" toward the Atlanta Hawks' bench. "I 100 percent do not in any way promote gang violence or anything close to it." Pierce said in a statement. "I am sorry if it was misinterpreted that way at Saturday's game."