There is still no timetable for when he'll play in his first rehab game, but he will continue to increase the intensity of his on-field workouts.
"He's got a lot more people down there to start doing field stuff," Twins trainer Dave Pruemer said. "He'll also get into some warmer weather. And he'll continue to do everything else he's been doing."
Mauer joins second baseman Tsuyoshi Nishioka (broken left fibula) and designated hitter Jim Thome (strained left oblique) in Florida, as they are also rehabbing at the Lee County Sports Complex.
Nishioka started sprinting drills on Monday and reported no discomfort, while Thome had four at-bats in a simulated game, according to Pruemer.
Thome is scheduled to play in his first full rehab game on Tuesday, and is tentatively scheduled to play in three extending Spring Training games before possibly joining the team this weekend when they play Arizona in Interleague Play.
Outfielder Jason Repko (strained right hamstring) is also scheduled to play with Triple-A Rochester on Tuesday to see better pitching, as he saw action in two extended Spring Training games.