Twins' catcher Joe Mauer is heading to Fort Myers, Florida today to continue his rehab from bilateral leg weakness.  Mauer has been working out in the pool in Minnesota and has taken batting practice.  There is still no timetable for his return.  2nd baseman Tsuyoshi Nishioka is progressing from a broken leg and has begun sprinting with no discomfort.  Designated hitter Jim Thome took 4 at-bats in a simulated game Monday and he progresses from an oblique injury.