In any case, league rules would prohibit teams from signing Arocha while he is still a Cuban national.

League rules prohibit teams from trading down before a draft and then signing a restricted player to an offer sheet.

Commissioner Bud Selig has prohibited teams from publicly announcing or commenting on anything of note until the Series is completed.

National Football League tampering regulations prohibit teams from contacting a coach while his team is still playing.

Spencer might have been released Tuesday if it was not for a rule prohibiting teams from releasing players who are on the disabled list.

With the exception of the Green Bay Packers, because of a grandfather clause, the league also prohibits teams from being sold to the public.

This ban prohibits teams from running "extreme" engine maps in qualifying before reverting to a "safer" map for the race.

Little League rules generally prohibit teams from taking players beyond their boundaries, as a precaution against recruitment of superior players.

"It certainly prohibits teams from using different angles for undoing contracts."

NFL rules prohibit teams from contacting prospective free agents or their agents until free agency begins.