San Diego Padres star Manny Machado, who underwent offseason surgery to alleviate tennis elbow in his right arm, has been throwing for roughly six weeks and has spent the last week or so ramping up the intensity on the field.

Swinging a bat and fielding ground balls isn't a problem, Machado said. The biggest question, which hovers over his availability for the Padres' season-opening two-game series from South Korea on March 20, is "what my arm can tolerate throwing wise."