NFL commissioner Roger Goodell will determine the full length of the suspension after the Cowboys' game in Washington on Nov. 16.
"If he earns his way to a point that he can be considered to play again, then I would support that," Cowboys owner Jerry Jones said. "Frankly, just as he earned through his behavior the right to get back in and play a few weeks ago, he would have to earn that."
The league said reinstatement will depend on strict compliance with treatment plans by the NFL and the Cowboys and an evaluation by "clinical experts."
After repeated legal trouble while with the Tennessee Titans, Adam Jones was traded six months ago to Dallas, where he had stayed out of trouble until an alcohol-related scuffle Oct. 7 with one of his bodyguards at a private party at an upscale hotel.
In a letter to Jones, Goodell cited a "disturbing pattern of behavior and clearly inconsistent with the conditions I set for your continued participation in the NFL."
The disturbance at the hotel came six weeks after Goodell reinstated Jones from a 17-month suspension.
"It's terribly disappointing to me that we're dealing with this again and that he's reflecting so poorly on all of the players in this league, which they don't deserve," Goodell said.
Goodell said a lifetime ban remains a possibility.
More Cowboys:: Dallas acquired Pro Bowl wide receiver Roy Williams from Detroit. The Cowboys traded a first-round pick in 2009, plus a third- and sixth-round pick that year for Williams and a seventh-round pick in 2009. The fifth-year receiver has 262 career catches for 3,884 yards with 29 touchdowns. ... Punter Mat McBriar (broken foot) was placed on injured reserve.
Redskins: : 2005 NFL Most Valuable Player Shaun Alexander, unemployed since being cut by the Seahawks in April, signed a one-year deal with Washington to back up NFL leading rusher Clinton Portis. Alexander rushed for 1,880 yards in 2005 but has been hampered by injuries since. The Redskins also cut sixth-round draft pick Durant Brooks, who ranks last in the league in punting, and replaced him with former Seattle punter Ryan Plackemeier. To replace safety Reed Doughty (nerve condition), the Redskins added yet another former Seattle player, safety Mike Green.
: Lions:: Detroit placed starting quarterback Jon Kitna on the season-ending injured reserve list. Kitna suffered a back injury in a loss to Chicago two weeks ago. Dan Orlovsky, who played in Kitna's place against the Vikings last weekend, is expected to make his second career start at Houston on Sunday.
Chiefs:: Coach Herm Edwards said nine-time Pro Bowl tight end Tony Gonzalez was not traded before yesterday's deadline. Gonzalez, 32, had asked the Chiefs to explore a trade because he wants an opportunity to make a Super Bowl run before the end of his career. ... Running back Larry Johnson was charged last month with simple assault for allegedly pushing a woman at a Kansas City nightclub in February, the third time he has faced assault charges against a woman. Johnson will appear in Kansas City Municipal Court on Dec. 3 and faces a maximum jail term of six months and a $500 fine.
Giants: : Eli Manning bruised his chest in New York's 35-14 loss to the Browns, and coach Tom Coughlin was not certain about the extent of the injury but gave indications the quarterback would practice for this weekend's game against the 49ers.
Steelers: : Pittsburgh is asking the NFL to clarify why Hines Ward, one of the best-blocking wide receivers, was fined $15,000 the past two games for unnecessary roughness despite not being penalized. Tomlin plans to call the NFL office, and team chairman Dan Rooney wrote a letter asking why Ward was fined.
Scheduling: : The NFL is not expected to increase the number of regular-season games for the 2009 season. A report looking at adding regular-season games and cutting the number of preseason games was reviewed at the NFL owners meetings. Goodell said no action was taken by the owners and that he doesn't expect any change in the schedule to take place next season.