KISSIMMEE, Fla. - Alex Rodriguez's "green light" during the offseason has led to a red-hot exhibition start.

A-Rod reported to camp about 10 pounds lighter and has noticed an immediate difference. "I think my work overall has been more consistent," he said after hitting a two-run homer in the Yankees' 10-8 win over the Astros Sunday. "I feel stronger, more flexible. Throw the stats out in spring training, but overall, I feel pretty good."

Rodriguez is 6-for-13 with a 1.000 slugging percentage in five games. "He's been pretty locked in from Day 1," Joe Girardi said.

A-Rod attributed that to being able to start his offseason workout program earlier than in previous seasons, a program that included visits from hitting coach Kevin Long.

The day after reporting, A-Rod talked about getting the "green light" to work out this past offseason the way he did before hip surgery in March 2009.