TAMPA BAY, Fla. — It was a scary moment Sunday in pro baseball when Tampa Bay Pitcher Alex Cobb took a hard drive to his head.

Now the accident is opening a debate about how to keep players safe on the field.

The ball slammed into Cobb at more than 100 miles an hour sending him to the ground. The 25-year old is home with a mild concussion.

It has the league considering head-gear for pitchers to protect them from blows like this in the future.

"I don't think any cap is going to protect them 100-percent. There are materials that they're using that will lessen the blow," said orthopedic surgeon Doctor Daniel Murphy. "However I don't think there’s anything on the horizon that would completely alleviate the severity of a ball hitting the head at high speed."

Some companies are working on prototypes with a bulletproof lining.