Craig Gentry (back) hit off a tee Monday, but Oakland still doesn't have a timetable for his return to game action. His activity on the practice fields is slowly increasing each day, so it's only a matter of time before he steps between the lines. Gentry has yet to make his Cactus League debut due to a lower back strain. Acquired from the Rangers over the winter, Gentry batted .288 with a .365 on-base percentage last season in Texas.