Blue Jays' Brandon Belt: Out with back injury

Belt (back) is not in the lineup for Monday's game in Oakland.

Belt has now missed three straight starts and five of the last six games with a nagging back issue. The Blue Jays haven't seemed concerned that it could lead to a stint on the injured list, but the odds that it will increase as his absence lingers. Vladimir Guerrero is at designated hitter and Spencer Horwitz is playing first base Monday.