Tampa, Fla. ? Yankees outfielder-designated hitter Hideki Matsui resumed on-field batting practice Saturday, taking 55 swings as he continues to rehab a sore left knee.

Matsui, who went on the 15-day disabled list June 27, also hit off a tee and took part in a soft-toss session for the fourth consecutive day. He is scheduled to take BP again today.

Also, left fielder Johnny Damon underwent treatment for his injured left shoulder and still plans to hit off a tee Monday.