There is no other information available. Bradley recently finished up his first season in Seattle by hitting just .205/.292/.348 in 278 plate appearances, struggling with personal issues that necessitated a leave of absence from the club. Bradley is notorious for being a difficult person to get along with, but had yet to have off-the-field issues that became public... until now.
Geoff Baker of the Seattle Times reports that L.A. police have confirmed Bradley was arrested for violating California penal code 422, which involves a "criminal threat" to cause harm to another person.
UPDATE : Baker adds that the threat was made against a female, and Bradley was arrested at his home at 10:40 a.m. PST. He was released on $50,000 bail.
While Bradley appears to have not done anything, a threat can be enough for arrest as the code reveals :
Any person who willfully threatens to commit a crime which will result in death or great bodily injury to another person, with the specific intent that the statement, made verbally, in writing, or by means of an electronic communication device, is to be taken as a threat, even if there is no intent of actually carrying it out, which, on its face and under the circumstances in which it is made, is so unequivocal, unconditional, immediate, and specific as to convey to the person threatened, a gravity of purpose and an immediate prospect of execution of the threat, and thereby causes that person reasonably to be in sustained fear for his or her own safety or for his or her immediate family's safety shall be punished by imprisonment in the county jail not to exceed one year, or by imprisonment in the state prison.
-- Evan Brunell
UPDATE: Mariners general manager Jack Zduriencik released a statement Tuesday evening, but didn't shed much new light on the incident:
"After reaching Milton Bradley's representatives tonight I was able to confirm that Milton had been arrested, and subsequently released, in Los Angeles. While we do not yet have full details on what occurred, we are aware of the situation and take it very seriously. We are in the process of determining the full circumstances of what occurred today. Until we have more information, we will not be able to comment further."
-- C. Trent Rosecrans