DETROIT -- J.D. Martinez had a good day Friday, Tigers manager Brad Ausmus said.
The nature of the slugger's right midfoot injury, a sprain of the Lisfranc ligament, means a lot of what he can do depends on how he feels from day to day.
"There's no timetable," manager Brad Ausmus said Saturday morning. "It's kind of as tolerated. We'll see how he progresses."
The original timetable was a general one, three to four weeks for him to resume baseball activities. That was announced on March 24. If Martinez stays relatively close to that timetable, he could be back in late April.
"If two days from now he feels great, he can start [baseball activity] then," Ausmus said. "But there's no timetable."
The Lisfranc ligament is a tricky injury, according to doctors, because of its location in the middle of the foot, its connection to the metatarsal bones that extend to the toes, and its role in so many activities.
Martinez felt good enough Friday to begin swinging a bat, Ausmus said. He wasn't taking batting practice, but dry swings in the air. That followed his visit with a doctor in Lakeland, Fla., to check how his foot is healing.
The Tigers have been platooning Tyler Collins and Michael Mahtook in right field with Martinez out. Collins has struggled with wind-blown fly balls in his last two starts, including a Pablo Sandoval popup that carried over his head and off his glove for an error in Friday's home opener. Though Collins' reaction suggested he might have lost the ball in the sun, he said Saturday that the wind carried it.
Mahtook, who drove in the game-tying run with an pinch-hit double Friday, started in right Saturday with lefty Eduardo Rodriguez starting on the mound for Boston. Mahtook also helped hold the potential tying run at third base in the ninth inning Friday with a quick throw back into the infield on Mitch Moreland's double into the corner.

Quick hits
•  The Tigers activated lefty reliever Kyle Ryan from the paternity leave list Saturday and optioned Blaine Hardy back to Triple-A Toledo. Ryan, who returned to Lakeland for the birth of his child, had an adventurous return to Detroit when his flight was cancelled Friday night. With no rebooking available until Monday, Ryan had to improvise, flying to Columbus, Ohio, and driving to Detroit from there on Saturday morning.
•  Justin Wilson's fastball averaged 97 mph on Friday, two ticks above his average fastball last season and his average on Opening Day at Chicago on Tuesday. He chalked it up to the extra adrenaline of the home crowd more than a slimmer body frame, which he expects to make more of a difference when he begins pitching in back-to-back games.