The Twins won't activate Joe Mauer from the disabled list until he's ready to catch full-time. Minnesota does have the option to activate Mauer and use him as a designated hitter. Mauer, who is recovering from bilateral leg weakness and a viral infection, has been swinging a bat at Target Field since Wednesday. He last played on April 12. "We're rehabbing him to come back and be our main catcher for the final four-plus months of the season," general manager Bill Smith said. "The only way we're going to achieve that goal is to have him go through the rehab process that he's going through now."