Pro Modified racer Scott Ray's condition continues to improve after suffering a heart attack on Sunday.

Ray underwent a four-way bypass surgery on Monday and by Tuesday he was up walking.

"I couldn't believe it," Stan Ray said. "[He] seems to being doing really well, but still sleeps a lot and a little "groggy" at times."

The Ray family has plans to be back racing as early as the NHRA at St. Louis, Mo., in May.