Alvarez (shoulder) is without a timetable to resume throwing, the San Francisco Chronicle's Susan Slusser reports.
He is expected to find out Saturday from the Athletics' doctors if he can begin a throwing program, according to the Bay Area News Group's John Hickey, so more information should be forthcoming. Given his low upside (career 12.6-percent strikeout rate) and injury history, he's only worth a stash in deep leagues.