NEW YORK (AP) — Yankees first baseman Mark Teixeira will be sidelined for at least three games because of a strained muscle in his back, the latest injury to slow the team’s leading run producer. Teixeira has been hampered by a left lower lat injury that was causing spasms in his back for about a month. The pain escalated during New York’s weekend sweep of the Cincinnati Reds immediately following the All-Star break.