Danny Grewcock will miss the New Zealand leg of England's summer tour after being sent off in the Parker Pen Challenge Cup final.
Grewcock aimed several punches at Dallaglio
The Bath captain was red carded for punching Wasps skipper - and his England team-mate - Lawrence Dallaglio in Bath's 48-30 defeat at the Madejski Stadium.
Independent match commissioner Brian McLaughlin, of Ireland, convened a hearing after the game, which Grewcock and Dallaglio both attended.
McLaughlin handed Grewcock a 14-day ban that will begin on 1 June.
It means he cannot face either the New Zealand Maori in New Plymouth on 9 June or the All Blacks in Wellington on 14 June.
Grewcock has 72 hours to appeal after he has received written confirmation of the decision.
Coach Clive Woodward is due to announce his squad on Tuesday, with England also playing Australia in Melbourne on 21 June, for which Grewcock would be available.
Grewcock rained a series of blows on the top of Dallaglio's head, who was trapped at the bottom of a second-half ruck.
A furious Dallaglio could not conceal his anger as Grewcock departed - his second red card this season after a dismissal last September against Saracens.
On that occasion he saw a five-week ban quashed when a Rugby Football Union appeal panel ruled he had not
deliberately kicked Saracens scrum-half Kyran Bracken.
"I don't know what happened, but it was enough to send him off," said Dallaglio.
"Frustration can sometimes get the better of you, and it has been a frustrating time for Bath."
The sending-off overshadowed a game dominated by Wasps, who scored six tries to Bath's four.
"We finished off our chances well," added Dallaglio. "Bath showed courage and determination, but every time they scored, we moved up a gear.
"We targeted this competition this season. We played, and beat, some very good sides to reach the final, and winning here gives us some momentum for the Premiership play-off final against Gloucester next Saturday."
Wasps deserved their celebrations
Wasps, 15 points adrift of Gloucester in the league, will be crowned champions if they beat the table toppers at Twickenham.
But Bath, after a dismal season in which they staved off relegation on the final day, missed the chance to gain an unlikely Heineken Cup spot.
"Both sides went at it as hard as they could, and Wasps put us under a lot of pressure," said coach Michael Foley.
"Our side produced a courageous performance, and scoring 30 points is normally enough to win a final."